I've never really understood "cliche" as a complaint. The reason these things are cliché is because they've been proven to workthe only difference is in execution. sometimes they work better than others. So while elements of this movie might be "cliche," there are times when it doesn't bother me. Obviously Idris Elba was going to sacrifice himself. That's not "cliché" or bad, that's proper foreshadowing and seedingthat's good storytelling. and there are times when it does. Idris Elba's speech at the end is cheesynot because it's inherently cliché though, but just because it's been done before, and better. Cliche, for me, basically boils down tothere are so many more reference points to compare movie X to, so maybe I'm going to be less lenient on the storytelling compared to something that's taking a leap of faith, something that is a bit experimental. But if a story is trying to tell a "cliche" and does it well? More power to them, in my book.
But if cliches were just inherently bad, then, well, just about every single story ever told would be bad. But I don't think that's enough.
edit: also, I don't think the exposition scenes were bad at all. Ron Pearlman wasn't just explaining what happened, he was boasting. It's doubles as both exposition, it's the set-up for the punchline (which is him getting eaten). You're always going to get exposition in any story because shit needs to be explained; it's all about how it's presented and I don't think it was ever particularly clunky in Pacific Rim.