The story behind the executive producers is a funny and sad one. Eddie Guzelian was the first producer and while he was working on the show, he would give Disney footage of the show and they would approve it mostly because A ) RPM was slated to be the end of Power Rangers B ) Disney wanted to go out with a bang and thought the premise was cool. Eventually they started to bitch about the budget and fired Eddie over that even thou they told him that everything he was doing was great. After episode 18, a long time Power Rangers guy, Judd Lynn picked up things and was able to make the second half seem as if everything was all gravy. The biggest change from the first 18 episodes to the others is more usage of Japanese footage and that one behind the scenes episode.
As for the transition from Samurai to MEGAFORCE, I just like my Ranger shows to feel as if they are a part of a greater Rangers universe. Sure, they added Bulk and Spike but Bulk was no way near the version of himself presented in >in Space - Lost Galaxy<. It also pissed me off that Skull ends up being rich and Bulk can barely hold a job. I call bullshit on that! Seriously, long time friends who have been through as much as Bulk and Skull, just don't leave each other hanging. At the very least, Bulk should have been somewhat successful while Skull went big-time. Also, they made Bulk such a punk ass bitch. Seriously! THIS guy helped saved the Earth from a all out invasion in the last two episodes of "Power Rangers in Space" as well as saved the Rangers multiple times and you're telling me that he's still whimpy when it comes to monsters?! I REALLY REALLY hope that MEGAFORCE explains Samurai to be in the Beta universe.