Jameson can be useful for G3 SCB, which, if I have the power for, plan on doing all day every day; quicker discharge with less heat at the cost of more power usage? Yes please. Then again, SCB’s are perfectly fine unmodded, so it’s no big deal really.
And Marco does have the advantage of being slightly more centralised. I don’t plan on ever using a G5 overcharged powerplant, so for that, I can use either Hera or Marco.
But yeah, other than that, he’s pretty much a gatekeeper for Palin it seems