A reference is made to Grievous ransacking Hondo’s base in the one episode, but seen in the other. I think it can be worked around.
Yep.
And honestly I don’t think the Younglings arc depicts Grievous that badly. You’d only need to trim the bit where he goes all out villainous gloating after Ahsoka flees, when’s fired upon by Slave I, and maybe the space battle with Obi-Wan’s forces (this one mostly for pacing). The lightsaber duel with Ahsoka is decidedly balanced in Grievous’s favor.