Problems:
-Until you get 1 mavor already several sats are killing the enemy
-Sat is much more accurate
-Mavor is worse than 3 t3 stationary artis if they are in range
-UEF has no scouting unit to use mavor which is very needed for it. Ylona does not need a lot of precise scouting and paragon does not need as well as a game ender
Offers:
Sat sounds more like an intel unit for me and to remove the fact to have 2 weapons for the same thing (unlimited range weapon) i would suppose to make sat an exp intel unit like eye. Aeon got a non exp Mavor (salvation) so why not to give uef an experimental intel unit.
Example:
Sat costs 10k mass and uses 10k energy, can get adjacency of t3 pgens. the sattelite will stay the same but has no weapon anymore. Instead it gets 4km Vision (like soothsayer) and 4km omni and a t3 radar. Sonar i would not add because thats a bit strange to get sonar in space

Result:
Mavor has a scout and uef can use t3 arti and mavor better than any other faction because of great scouting.