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.
Somewhat agree. Given the existence of surprise rounds, this still easily allows your whole party to get full round without enemy response. It should be more difficult to get off a full surprise round because enemies should have an easier time noticing us than they currently do.
But yes, I agree that the rest of your party should be put in combat regardless of their stealth status. The characters that were stealthed should of course remain stealthed, and thus get their first attack at advantage unless discovered.
For characters that may be across the map, perhaps they should not automatically enter combat. But they should not be able to enter within range of the combat without being forced into (the end of) turn order. Once you get (60m? whatever the range is that is greater than maximum bow/spell range) from an enemy in combat, you should be forced into combat
