First of all I'm not trying to create controversies been a Ratchet and Clank fan for many years now, and I've always enjoyed them. However like most loyle fans, I also happen to be critical of what I support.
Now a days most ratch and clanks are only about 8-12 hours long, with no split screen, co-op, a mediocre story with no emotional appeal, and usually only have 3 difficulties. I can easily beat the game with only dying a few times on the hardest difficulty.
I played future tools of destruction, and A crack in time (the only 2 I played on ps3) and I would probably give them both high a 8/10, simply because they are fun, have good graphics, and are better than most other games. However, they could be so much better if the developers invested more time into the story, or lengthened the campaign, or added some type of multi player or online. I also noticed sales of Ratch and Clank games sales have plummeted since last generation.
Up your arsenal was about 15-20 hours with excellent character development, a challenging difficulty, and decent multiplayer.
Did insomniac stop caring about Ratch and clank? Thoughts?
I disagree, they have taken the series in a different direction before the next trillogy though (Qforce and All 4 One). I view this as a good thing though as I like game series changing things up. None the less expect a return back to normal R&C in the next trillogy.
Nope their making a brand new R&C game soon. Here is my post about it!
In Insomniac's last couple of efforts for the Ratchet and Clank series, they gave you exactly what you're looking for: the first batch of co-op experiences in this long-running franchise. However, these games themselves have detracted from the single-player-minded Ratchet and Clank formula that fans originally fell in love with. That is where the upcoming next edition of the series, the recently announced Ratchet and Clank: Into the Nexus, steps in.
If you want co-op and battles against another player, you can check out Ratchet and Clank: All 4 One or Ratchet and Clank: Full Frontal Assault. Where All 4 One pairs up Ratchet and Clank with old nemeses, namely Qwark and Dr. Nefarious, Full Frontal Assault on the other hand mixes up the gameplay genre by outfitting players in a strategy-based outing. You can gain help from fellow players over the network or attempt to destroy them and their fortress when they're on the other team.
With games such as Ratchet and Clank Future: Tools of Destruction in mind, I wouldn't say that Insomniac abandoned the Ratchet and Clank fanbase. With that game in particular, I'd say they only managed to strengthen it by creating one of the most solid efforts the series has yet seen. Compared to their more recent efforts, the games with the online-centric aspects you're asking for, that's where the company's dedication for having a stronger game in mind seems to have slipped. Hopefully the upcoming entry for Ratchet and Clank: Into the Nexus gets the games back on track.
At least Into the Nexus looks good, a true sequel to ACIT (which is the best in the series IMO)