Statements like that are what make me nervous, because you seem to be saying we know exotic dark matter is out there and are now simply refining our understanding of that known substance. Another unhypothesized approach might be accurate, but we've already found the answer so we won't bother looking for it. If you're just saying direct detection experiments will narrow the space of all possible theories that's different, of course, but if you're saying dark matter has been proven by default and we're just seeking experimental and observational evidence to better describe what we know to exist we're back where we started: We've never directly detected it, but we know it's there, so let's keep looking till we find it. Whether it actually IS there or not. I'm not confident that we'll quickly realize if it's not there because it's impossible to prove a negative; that's why there are still people looking for proton decay despite the fact it's not only unlikely to occur, but unlikely to be detectable in any reproducable way even if it does.