I was going to do a game with training roulette, but then I decided I'd do another vanilla game first, now that I knew the vanilla builds I liked, and I never finished that one... Some skills are much better on different classes than the ones they come with originally.. Battlescanner would be a great support skill, instead of giving it to a sniper, for example.
One question though: How did you manage to kill many aliens with reaction fire? My soldiers always fired all at the same time on the first alien to be seen moving, which meant they blew it to pieces and then blew the pieces to oblivion, but the alien's two friends were left unscathed. That was one of the most frustrating thing about the remake, compared to the old XCom where soldiers fire one by one.