1. The odds of a suited connector beating aces is 20+%, but that is by the river, where many draws can come through. generally, against a high pocket, you can't count on being able to draw (position helps with this). so, you're looking at flopping a better hand than aces, and the odds of that are down around 5%. You can still call a 5xBB raise, but that might help explain why the hand is pretty fragile and needs all the help it can get.

2. I think raising with suited connectors should be a sometimes thing, not an all the time thing. If you've folded your last 15 hands, and you get 89s on the button, go ahead and raise it if its not contested preflop. Most of the time, you'll get 1-2 callers, put out a continuation bet on the flop, and take it down there. If you hit it big, good stuff, if you miss, check/fold the turn on out. Don't do it if the table is loose/full of calling stations.

3. Your choice here. Everyone has their SB preferences. I tend to play generally what you do, more if the table is looser, less if tighter. I usually only play from the sb with many limpers if my hand is very marginal though (e.g. unsuited connector.)

4. I personally think Axs is junk. If I'm facing a raise, I fold A10s, A10o, AJs, AJo, and depending on the situation i might fold aq. i probably should fold it more than I do.