In a nutshell, I would say yes. The above words all share the core definition common with "only". I think a lot of it would depend on context of the argument and statement. Do you have an example?
A fact can be part of some context, so there’s no issue there. The issue with answer E is that the conclusion isn’t trying to defend artistic preferences of people in general. It’s making a claim about artistic preferences. Super subtle, I know.
There is a group 2 indicator (only) and a group 4 indicator (cannot) in that sentence. So you can use either one, but generally it's easier to use group 4 indicators as negations and use the other one as the logical indicator.
@"Accounts Playable" Yes. I would treat "it is a given" and "for such" as premise indicators. "Given" would introduce evidence (premise) for a conclusion. Treat "for such" the same as you would "for".