Anet why only 3 professions?
Eles real problem is that they can do weird things in mist. Otherwise, blind them. Go stealth. There are classes that can easily stomp them.
Thieves are the same. There are classes that can easily stomp them.
The imbalance I see is in the relative ease to get yourself up or protect yourself. Some classes are just way better. Now that is ok if they have glaring weaknesses otherwise. So, for example, a ranger is really good in downed state at healing themselves. Fine, they stink at condition removal and have very little stability.
I would say the engineer’s downstate is considered end state for a lot of reasons!
Ranger on the other hand, just on down state, is a bit too good and underwater is outright silly.
As for taking the time to balance, it is much easier to deal with down state imbalance versus active imbalance. Of course, first you need to get rid of wonkiness like some things that can happen with mist in WvW or ranger pets in underwater.
I really think they just need to get rid of #2 and #3 in the downstate and everything would be perfect.