I look at Gree as a new figure... Realistic style Phase I Gree was never made till this one. Like realistic styled Rex was new, and thankfully getting a better version too.
Realistic Gree I sucked it up and bought to replace joints, more or less, where I am able.
If they did other Clones from the toon, like Phase I Cody or Bly, I'd buy in I'm sure. Same with an Echo or Fives or anyone else really.
While I agree on some of the character choices, ultimately this line isn't for collectors and is more kid-targeted, so as gateway figures it's a must to have the mains out there for the kids. If some collectors jump on along the way, more the better for Hasbro ultimately, right?
I think at the end of the day, every line they make, they want to have some kid appeal to it, but the collector lines in TBS are going to give that extra umph to get collectors to buy and be (relatively speaking) content (almost hard to type that without cracking up). So with TBS you'll have your Vaders here and there, but you'll have your scene-specific Vader with slight upgrades or changes, you'll get your upgrades, you'll get your random Mosep or Toryn Farr... Legends so far has been pretty vanilla stuff comparatively speaking. Even Bounty Hunters fall into that category of not so obscure that kids don't know who they are and dig them. Notice IG-88 and Bossk rolled out, but not Dengar. Dengar... no love in any line from kiddies.

Either way, Legends has some things I'm into here and there... Just not very much. I was actually pretty happy to get Gree, in a way, but kinda disappointed too. It was a real catch 22 getting a figure I wanted, but he's only 5 POA. He'll take some work but I can make him cool. Others, like making a cool AT-DP Driver, are going to be a lot more work if I want him accurate. And the JT Guard? He's pretty much a figure I'll buy for pieces to cast, and try an almost ground-up custom that makes me happy.