Now my opinion, or lack thereof... Warning, Mockingjay spoilers!
I have never played Chrono Cross, but I believe I have heard enough so that I never will. My main concern is the fates of the characters from Trigger. I mean: think of it this way. You finish Trigger, and you feel really good about all the characters. As for myself, it feels like I actually feel for all of them. I was so happy when I found out Crono and Marle got married! Now I hoped that Lucca would find a love. Then I hear a sequel, which overjoyed me. I just have this thing about peoples futures and their families, etc. Then I hear, Guardia falls? All of the previous characters, (possibly) killed? It hurts, really hurts. Is this what the canonical story line is supposed to be? In fact, I almost lost my total interest in Chrono things altogether when I hear Lucca gets murdered. For those who have read it: it feels similar to how Mockingjay in the Hunger Games makes you feel, though possibly worse. You know, "Oh, you really do love these characters? It would rip out your heart to see them die? Well too bad!" *slaughtered Finnick, Prim, etc.* I just can't accept Cross or Radical Dreamers as a canonical line if that's the way it will be. If any, no, ALL of this is even plausibly fixed in the end, Please do not hesitate to tell me, spoilers and all. Like I said, more likely then not I am never playing Cross. I joined here because I see Trigger as one of the best RPGs ever, ruling side by side with Earthbound IMO.
Kudos if you decided to read the while thing. I probably sound like I'm taking the whole thing personally, but I'll risk that to be heard.
P.S. Forgive any possible grammar errors. My Android's autocorrect likes to screw up on me a lot...