Takeru is... definitely not the best red ranger, haha.
I like him a lot though, but I feel that... there were many "flaws" in his character that kinda spoiled everything.
Ideally, they could write Takeru off as a totally cold-hearted Lord; learning since young that servants are but servants, and shouldn't be treated anymore humanly, and from the first episode, they could at least show him being cold and cutting himself off from the rest, sorta giving off "Better than you" vibes.
From there, we could've branched the different characters - perhaps a super loyal Blue who understands all these, a rebellious Green who doesn't get why he has to be surpressed under someone else, a dumb Yellow who thinks it's right to just follow orders, and an understanding Pink who would then try to "connect" the Lord & the rest.
But hey, that's the sub-chars we got from Shinkenger actually, but unfortunately, none of them were well executed due to the poor writing.
From here, they could actually do a slow progression for Takeru; from a beginning Lord who views servants as nothing but servants, to a compassionate team player who finally understands teamwork. It may be cheesy, but I think it would garner pretty positive approval from the fanbase.