For me the easier fix would be that once you engage a stealth surprise attack, the rest of your party is put in combat regardless of their stealth status or location. It's crazy I can open on Ethel with Lazael or my rogue/druid from stealth, and then pelt her with a Hex from Gale, open with Bless with Shadowheart, and this all gives me a free extra turn before I unleash my true barrage.
Of course, it would make aggravating fights like Bulette/Githyanki harder, but it is a necessary evil to fix these gamebreaking exploits and just balance the multi-actions of Bulette and AC of Githyankis and multi-actions of Minotaurs after fixing the exploits to make the fights manageable.
This is something they need to realize on a much larger scale before developing more content.
Fix the exploits. Create a functional resting system. Fix the action economy and home brew.Otherwise they will end up with an extremely broken game later in the levels. Level 11 Wizards who can Long Rest after every fight. Enemies needing even more "unfair" abilities to counterbalance all the cheese available to players, amplified exponentially at higher levels. A level 11 great weapon Fighter launching a "stealth" attack, hitting an enemy 6 times before they can react.
Changing everything and reworking every encounter later would be such a daunting task they just might leave it broken or try to fix it with some more suspicious home brew like extra HP. So the foundation of the game needs to be extremely solid. And in the EA, it definitely isn't.
