Criticising a Remaster for not being new enough, is like criticising a platformer for being a platformer, or a game for being a game. You might as well say you don't agree with Remasters and leave it at that.
Its not a remaster though. Its a reboot/remaster. If it were a remaster, there wouldn't be such radical changes, but the game occupies some weird space between the two.
Differences
*Drek, how Ratchet and Clank meet, characters, etc are totally different in behavior and arc
*Many of the weapons are from the Future series, many from the original are missing
*Some remixed planets, mechanics from later games, change in order in how gadgets are obtained
Similarities
*Some levels are literally copy and paste in their layout
*The general storyline is the same
*The progression through the game is mostly the same, gold bolt locations, etc.
So its not a remaster. And there is no excuses for not at least trying to do what the original games did best, create cooky and fun weapons. As it stands, Zurkon, the combusted, fusion grenade, and groovitron have been in ToD, QFB, CiT, A4O, FFA, and Into the Nexus, without any major changes. Zurkon doesn't even have any new recorded lines as far as I can tell, which gives him about 6-10 phrases he keeps repeating.
I think the game is great so far but I can see the cut corners with my own two eyes.