Many of them seem to hate everything outside of the original trilogy because of the more modernized CGI and how often its used. Granted, many can argue Lucas overdid it in the prequels, but beyond that I'm not sure what you want the film makers to do. Use late 70's/early 80's CGI in all future Star Wars films?
I'd like them to do what they did in Rogue One. They maintained the 70s/80s aesthetic of the original trilogy, with the clunky control panels, 70s-like monitor graphics, old style haircuts, used-looking props everywhere, hands-on feel to everything, characters in costumes and so on. While doing that, they integrated a good amount of CGI in ways that didn't stand out as CGI (well, minus the digital actors). They didn't add things into scenes to go "look, CGI!" like Lucas did with the prequels and the Special Editions.
Speaking of the prequels, one of the stupidest things that Lucas did to undermine his universe, IMO, was to fill them with CGI robot soldiers, especially ones that can transform between bipedal and spherical and throw up force fields. They're
prequels, and are supposed to have technology older than the original trilogy, but look futuristic, instead. Also, if they could simply have robots do all of the fighting a few decades earlier, why would they eventually abandon that and go back to men in body armor? It makes no sense, but Lucas did it just because he could, thanks to new-fangled CGI, and because he thought that it'd be cool. He didn't understand or care anything about consistency in a universe.
Some may argue that films should adapt to fit the eras in which they're made, and that modern Star Wars episodes needn't honor the early 80s aesthetic and technology of the original trilogy, but that contributes to the charm of the universe. It's futuristic, but also retro. It's like post-apocalyptic settings, where part of the charm is that everything is stuck in a period decades earlier. For example, the new Mad Max film honored the 80s aesthetic of its franchise by not obviously incorporating anything that couldn't have been in the original films, and future films are likely to continue that.
I was very pleased with how Rogue One looked and I hope that further films continue with that, even though they're set in the future. The writers should fight the temptation to incorporate much "futuristic" stuff (like touchscreen panels, teleportation, cloaking devices and other common sci-fi conventions) because those things just aren't
Star Wars, IMO, and directors should fight the urge to stylize things too much (ex. with lens flare and odd camera angles; i.e. things that Abrams is guilty of). You can use modern techniques, shoot in digital and employ CGI to make a stunning film while still honoring the Star Wars look. I think that Rogue One did that a little better than The Force Awakens and, even though these new films don't exactly
thrill me, if further ones are similar in look and judicious usage of technology to RO, I'll be pleased.