I wouldn't worry too much about the gameplay and loadout stuff too much right now. Just get your map looking good.
Lol, this is exactly what he should
not do. Gameplay comes first, and then I don't mean balance, but what you need to place static wise, where the routes to flags are, how many routes to the same flag there are etc. etc. That's first. If that fails, the map will never work, as we can see in various examples on #1.
Making the map "look good" is the last thing you do, after everything is set in stone what the map is gonna play like.
And stating that players are "used to" not being able to repair everything while there are 45 stock maps and I don't know how many CMP maps of which there are 4 (?) on which you can't repair sh*t (I understand the goal of it but the means is way too harsh imo because it effects land battle too much), well, that's just overstating things dramatically.
...but I am definately limiting the wrenches, maybe even just to a few pickups.
Limiting stuff is OK if things become too spammy. There are other ways to prevent people to zap-repair things like the Tiger. For example you could make it necessary to keep a number of footsoldiers for capping flags (plaving them inside a courtyard or something, so tanks can't reach them), otherwise the team can't win.