i think the main problem with JJs Star Wars (& Trek) is...
.. they're kind of juvenile .. lots of fast pace whiz bang CGI action, with alot of copy & paste from previous films (copying plot lines, remaking previous films, bringing stuff back for fan pleasing reasons), abit like expensive fan films
Its like what a big budget Wars/Trek would be if a geek obsessed teenager were asked to write and direct a Wars/Trek movies (and made a Spielberg homage in Super8).. one with little experience of the 'real' world and spent most of their life in their room watching and reading geeky stuff.. but at same time a 40 something business minded corporate man (one who grew up a geek in the 70s/80s)
there is some stuff in JJs movies that's quite interesting and well done (some even verging on 'adult' filmmaking) but overall you just get that 'juvenile' feel to them that one never got with the previous SW/Trek films that feel like films directed by 'grown up' film makers (even the bad ones)..
I can just imagine what the likes of Harrison Ford and Leonard Nimoy must've thought about these movies (whod had those long careers and worked with all kinds of 'old school' filmmakers) - probably the same as what Scorsese thinks of Marvel.. theme-park rides..(altho Ford probably thought that with the OT at the time anyway).. but then at that point in their lives were obviously beyond caring and just focused on the $$$s - Ford anyway as he hadnt headlined a big movie in awhile and knew SW would be a major payday (probably the biggest of his career). Nimoy was obviously intrigued about a fresh new no expense spared approach to Trek from a 'hot' new team that focused on the original characters and was very receptive to being part of it when had refused previous Trek stuff he didn't feel was up to scratch .. but must've been let down/bewildered by some of it but probably figured it was just how movies are these days to appeal to the masses