On the Formosa question - I guess you have to try it to see and if it works for you, then it works for you, it makes sense to go for it because the fabrics are great and the cut is distinctive. However, I've seen Formosa look great on some people and distinctly ordinary on others.
Of course. Not every cut or style is going to work for everyone, no matter how nice the workmanship is. The trouble of course is that figuring out what works best for you takes a lot of time and effort (or if going MTM / bespoke, trial and error). A lot of people find one good thing and stick with it, even if something else might be better. I think the challenge is to figure out what works best for you before buying. Once you have something that works (and may be a big improvement over what you're used to, if sometimes for no other reason than wearing the correct size), further experimentation can be tough to justify for one on a budget.