Reservoir does gain life on its own, although admittedly we're not particularly well equipped to take advantage of it given our higher curve
For those of us who don't play Standard, we can sell it for a few tix
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.) Artifact - Vehicle Artifact (CTRL to add secondary) Copy Mindlink Mech Flying Whenever this Vehicle becomes crewed for the first time each turn, until end of turn, this Vehicle becomes a copy of target nonlegendary creature that crewed it this turn, except it's 4/3, it's a Vehicle artifact in addition to its other types, and it has flying
My guess is that the combination of all these factors graveyard hate being good, relevant typing, and synergy with both milling and removal effects already key to the deck makes this card more likely to be good than not, and possibly outstandingly so
This is very useful because if theres a card thats rising in price that you might not be using, you might consider selling it for extra tix