Awsome thread ! Thank you very much for your work writting it. I cant give you more rep

Ive got a question: what if i do that settlement attack in wing? It will split amterial or evryone in win got the same ?
Haven't tried to do it in a wing, but as far as I've heard each commander must repeat it's own scan chain in order to receive materials. If you'll got an occasion to try this in a wing - please, share your observations.
I'm not sure if you each need to scan the data points separately or if you "share" the data drops when you are in a wing, I suspect that the scans are probably separate but I'm not sure. Prior to creating this list/guide I had heard that what players were doing to deal with the high security bases was that they would help each other out by assaulting them in pairs, with one player using a heavily armed ship to deal with base defence ships and the second player driving around the SRV to scan the data points. That would take around an hour however due to base ships and turrets constantly respawning, i.e., the base would not stay "cleared" for very long. With all of the medium security bases we now have and the fact that they reset approximately every two weeks, plus the recent increase in data drops (3 mats instead of 1 every time MEF drops) there is really very little if any reason to bother assaulting the well defended bases. Going through the 36 medium security bases that are currently on the list took me around 12 hours and gave me 25 MEF, now a similar run-through would probably take even less time and give you even more MEF, so there is no real reason to frustrate yourself with the high security base assaults.
As I've already mentioned, I start to doubt about "more MEF" after 2.105. And as an improvement to the list with hi-sec settlements I plan to add - when I'll have enough time - mentions about anarchy bases.
I'm not sure which bases were having the issues with defence turrets reactivating or base defence ships respawning but I assume it was at the large high security settlements. I haven't seen the defences respawn myself because I never did those base assault missions as I have only been visiting the medium security settlements instead.
At some stage of my settlement's mapping I've tried to analyse the question of respawn rates but have't advanced too far (not a priority task), as base assaults - any security - prior to 2.1 was not a problem (the most difficult part was to find anarchy/lawless ones).
1) respawn rates affected by many parameters, and one of them - the method a given turret was disabled. Is it was simply blown by direct shooting or disabled by shutting down corresponding generator? It looks like in latter case there is more chances that generator will be repaired and the defensive system goes online once again - and in shorter period of time.
2) directly destroyed anti-ground turrets (AGT's) normally doesn't respawn at all, with some rare exceptions (like only one - of 23 present - particular turret in medium size hi-sec "civilian" layout). Or just respawn time is huge and I have no enough patience.
3) Defense platforms (big "anti-air") are so far all tend to respawn (5-20 mins?), at least when disabled by blowing up power generator (but when they are directly destroyed then can also respawn). Usually same behavior shows any other stationary anti-air turrets/missile launchers. Time also depends on particular layout/(security?) Good example - all large military layouts. Prior to 2.1 the most "lazy" approach was to disable one by one all generators (in settlement's core part and in satellites) using dumb missiles, then take out all skimmers and some other turrets - wait for generators to respawn - blow them once again and only after land/srv/scan datapoints/access sat's terminal then board and fly away before next respawn. Now they are heavily guarded by npc ships also.
4) Haven't notice so far cases of the respawn of directly destroyed skimmers, but if you have disabled them by scanning "skimmer access terminal" they'll respawn after some period of time. Btw, using this terminal can be a good way to deal with large hi-sec scientific layout (with two goliath-class skimmers on-guard), I'll try this some day.
5) As far as I've heard planetary bases can produce new "waves" of npc-ships if you destroy original defenders. Sometimes you can try to "relog" (if this doesn't affect your "immersion") to reduce the numbers/quality of defending npc-ships, also I've saw somewhere a brilliant idea not to kill them - only disable them instead (so new ones will not be called)
EDIT:
Almost forgot:
4a) Some bases can produce multiple "waves" of skimmers, but the number of those waves is limited (example - 2 waves in small hi-sec "outpost" layout). Indirectly this possibility can be assumed if skimmer's "hangar bays" are present in the settlement (but this is not an obligation - so if they are present it doesn't mean automatically that there will be "multiple" waves).