Had a couple of further thoughts re the 10% penalty issue - to be looked at later on tonight when I've downloaded the Beta test and tried it.
Currently when you sell a module, it remains available for immediate buy-back - at the same cost - until you leave the station. If this remained the case then you could still try outfitting options or change your mind in the outfitters without losing money. That would be more realistic and fairer as an option in my view. It may be that this facility has been retained.
I have a few ships that can share modules - if the buy-back option is not going to be without penalty, then how can I swap modules back and forth between my ships? I would hope that an immediate no-penalty buy-back would still be possible, in the way it is now, so that modules can still be transferred between ships. e.g. I want to share Class 5 shield generators and thrusters between my Vulture and Fer De Lance. I don't want to sell them, just swap them between two of my ships in the same shipyard. One can have the A-grade, the other can have a D-grade or C-grade version, so I'm not tying up too much money in a ship I am not using. Currently there is no direct swap, so I have to sell, change ship, and buy-back the module which is still in the outfitting screen at the top of the list.
In another thread about the new ships, there were a few voices complaining about "yet more small ships". Well, if the modules are going to cost a lot to keep changing, then smaller ships with smaller, cheaper modules will become much more useful and attractive in terms of loadout flexibility and running costs. This should help level the playing field for new players and those who can't spend as long generating vast fortunes to run, outfit and refit huge ships.
I'll have look at the Beta test later on and see how it is set up to operate.