So far, things I really like!

Having a mass effect field creating lightning storms is entirely consistant with the in game universe, as mass effect fields are produced via running electrical current through eezo - and this produces static charge. If it is on the scale that the alien technology is clearly built, it would produce a commensurately larger charge - and thus, the lightning.

Next thing I like!

They used mass effect relays (well, adapted Geth technology that used mass effect relays) to telescopically observe Andromeda! That is clever and neat!

Next thing I like!

HOLY SHIT YOU GO FROM ORBIT TO THE PLANETARY SURFACE WITHOUT A LOADING SCREEN! That's impressive!

Oh, also, the omni-tools are actually being shown doing the things the fluff says they can do. Which is awesome!