A subjective list of issues (compiled as feedback not complaint: 3 months into the update I'm having lots of fun with Trailblazers, and still building...)
1. Ground port + Orbital issue - the ground port greatly reinforces the planetary economies in Orbital by sending them up again through Strong Links, all with their own bonuses (this is by far the worst thing I encountered)
2. Planetary override economies are too strong (base is 1.0 vs 0.4/0.8 for strong link); add body features economies to this (geologicals etc.) to get the scale of the problem
3. Shipyards not appearing in stations - I have Tech Level 58 and my Coriolis has no shipyard, looks like all tech bonus has been assigned to my primary port (outpost); new update for this has just been announced though, looking forward to this
4. Security Station and Relay Station automatically add Military and Hi-Tech economy to all markets in system; please remove Military economy from Security Station (there are already 5 other sources for this) and add Comms Station as pre-requisite for Security Station (aside or instead of Relay Station)
5. Reiterate on the Weak Links design - I like the idea in general (some player influence on this would be welcome though), but why are these applied to stations with built-in economies? My asteroid bases have only a few extraction commodities because of system-wide Weak Links (and you can't really reinforce them with Strong Links because there are too few slots in rings).
6. Construction depots (and final stations) are all placed too close to body exclusion zones. I don't have a single Coriolis or Orbis that is placed far enough to easily navigate to in supercruise (I do manage, I choose a path to end up perpendicular to orbital planes before engaging SCA, but that's not the point). I don't know the exact rule for NPC stations (body size/gravity?) but I just made a tour on some of them - there is at least some variation in their placement, not the case with mine.
(7. No markets in some settlements - not encountered myself but definitely a serious issue confirmed by other players)
Thanks for all the work, I really enjoy Colonisation, and Panther Clipper Mk2 will double my interest
