If you enjoy Dairanger or Ohranger or Carranger, then you're a hypocrite. All these have kid members and are as well done as Justin, which isn't bad really. Not like MMPR was an epic treasure to begin with, so why the hate? If you don't, cmon. Justin was like a kid who can do anything in the realm of being a kid, and at least he wasn't like that kid in the film who could operate complex machinery for no reason.
Agree with Havoc, and no monkeys, but have the rangers swap minds with pets for an episode if we're gonna have a comedic episode.
Phantom Rangers would be reused Bioman suits, and in In Space , alien rangers from other older sentai are used sparingly until LG.