Personally speaking, I'd say overall the Guardians are worse in the MCU. Peter Quill is an idiotic manchild, Drax exists only to be laughed at, Gamora whose supposed to be the deadliest woman in the galaxy is far from it. The only real improvement is Nebula. Rocket id say is pretty accurate, and Groot only says Groots so.Are any of these changes bad though? Sticking to source material only matters if the source material is good.
Also not getting Quills element gun is a huge shame.