1) i would raise to 16 pre because most of the limpers at microstakes (especially 2nl) put money in the pot they are going to pay and see a flop, so charget them. Otherwise its fine. You could make an argument for checking the turn hrere because in a 3 way pot someone is likely to have a set/2 pair/straight here most of the time.

2) this is fine. If you want to play a big pot when you have a monster like this, you have to bet. You have to count on someone having a second best hand that they want to build a pot with though to get paid though. On a 3 flush board its going to be harder to get someone to pay you off unless they have 2 pair or floped a set.