In G1 Roller MegOp kid AU, what do the Autobots each think of Roller?
And does Megatron ever calm the Primus down? Or at least turn down the freak? (Knowing him, though he will probably ask Optimus if he wants more sparklings.) 
Oh they love him to bits no matter who his sire is.
Jazz and Prowl the best sparkling sitters
Sunstreaker and sideswipe love playing with roller and finding ways to make him laugh.
Bumblebee just loves not being the baby anymore and appoints himself as Rollers future mentor.
Hound cries if Roller does something cute (he cries a lot) and mirage and cliff have to comfort him.
Ironhide is like “hmm when can I give this thing a gun?”
Red alert is constantly monitoring the sparkling from afar and is absolutely terrified to hold him cause he’s worried he’s gonna drop him.
Ratchet takes the Sparklings health very seriously and sometimes over reacts when Roller takes a fall or a small bump to the helm.
And Wheeljack slips the lil guy some homemade treats
As for Megatron turning down his freak… ehhh it depends on who you ask?
Ratchet says he’s still the same bucket helmed freak as before. Constantly chasing Optimus around like a feral dog. Now he’s trying to add sparkling napping to the crazy shit he does.
Starscream says he’s worse now. Now Megatron has all but solidified his plan to make Optimus his “consort” and has over heard the freak muttering to himself about having even more children with the prime. He’s insane.
Optimus thinks he’s actually doing a little better. Most of Megatron’s focus is centered even more on Optimus and Roller than attacking human power plants and trying to kill people. He’s even being a little nicer about his approach’s… sorta? He’s just worried Roller might pick up some of Megatron’s strange behavior.
Megatron thinks he’s doing great! He’s got a beautiful wife and child now! He just has to kidnap them both so they can never leave him and he can rule over the earth and than retake cybertron and he can get his happily ever after with Optimus and have even more Sparklings with him!