The new shield animation/graphic is too big. They were small domes over them before. These or so huge you can't see anything behind them.
And just as importantly - you cant see the individual turrets if they're close together.
Bastion runs 3-9 multi turrets + Heavy Turret + sentinel - often clumped in one sentinel heal radius.
try to spot and heal the damaged turret... - you cant do it!
This icon might work fine for being at medium to long range - but the engi always sees it up close.
It obscures LOS and blocks a number of interesting play styles - leaving the engi with only one.