That will definitely make our guys a force to be reckoned with!
Another thing, as
@Goldfish mentioned, in aggregate all of those things together makes the Legion a hard target.
Generally speaking, you don't go after hard targets by throwing your head against it, you try to sap under it, or blow through it.
And one thing we're not lacking in is champions able of going tow to tow with the enemy.
As stated before, we got a lot of ways to amp up and boost our men's defenses. PfE banners, charms and servitors with useful SLAs. We even have war beasts with natural immunities to a lot of the stuff that tends to get thrown around in mass combat, hard countering the Enchantment school for example.
Finally, one of the problems with our new model army is that while they are excellent troops for going and mowing down waves of chaff and fodder, they seem to lack firepower. That's why we have dragons! And air ships!
On a smaller scale, Wyverns are nice delivery platforms on a tactical level. Being able to deliver munitions to anywhere on the battlefield, and quickly, and these are munitions that just so happen to threaten everyone and can't simply be dispelled.
Or in the case of Wildfire, which is not something even an Other champion wants dumped on him, he's spending an action dispelling the fire, and then another action needs to be spent to get rid of the
regular fire it turned into (or opportunity costs, you need rare resources to get complete immunity to fire, which Searing property in Wildfire deals with nicely).
Military industrial complex! Peace through superior firepower!