Lots of question...few answers.
What's my strongest concern? Visa and attitude!
After 27 years in Thailand (on work permit and tourist visa), I have seen many changes. Changes to the better? It's depends on whom you will ask....some will say yes and some say no. Remember EVERY country will change over the years.
Visa and attitude somehow are all coming together; and sorry to say so, but Thailand is one of the worst country's if it comes to visa and the ways of applying for it. Even Kurdistan (Northern Iraq) was better than Thailand. I am also holding a yearly residents visa for Egypt, which took 1 form, 20 minutes waiting and 87 dollars.
Would I sell and saddle now for Thailand? Hell NO, and I love Thailand and my Thai family.