Summer movie "Jurassic World" is a tent-pole film that is designed to bring in major box office revenue. The movie will entertain yet it is going to be light on plot and heavy on CGI. There is noting wrong with this per se, but the overabundance of CGI effects certainly detracts from anything of substance that is being left out of the film.
Jurassic World looks to be a great movie, and you are going to have to rely on CGI for a lot of stuff. To bring back Dinosaurs you need it more then anything, but still they need to make it as realistic as possible. The movie does look great, and should be a lot of fun, but to much CGI could ruin the movie.
I don't think that the new "Jurassic World" movie will rely too much on CGI. That does not mean, however, that there won't be a ton of CGI in it -- there will! But the appeal of the Jurassic series has always been its remarkable effects -- now the filmmakers are just better at them.
The recent trend of mostly CGI movies continues though to varying success. Some of these blockbuster movies use the CGI very effectively to show the kind of scene that would not be possible on a normal set. The original Jurassic Park is a great example of this and hopefully the new movie will be too.