
What you are trying to achieve is force players out of the spawn or punish them for not leaving spawn. To help them on the way, they will receive 10 seconds of a 75% Damage Reduction.
THE PROBLEM
Most scenarios will end in a spawn camp, so the players pushing out of spawn have to leave spawn and somehow completely defeat a spawn camping force within 10 seconds or get kicked from the scenario and get Quitter!.
One of two things will happen: The player will leave spawn, likely kill no one or a small skirmish occurs, the final result is that they will die and be back in spawn after 10 seconds. This player is now even more frustrated. OR the player will simply get kicked from the scenario, and stop queueing, maybe even log off because they now have Quitter.
This player is more than likely not having fun or any sort of enjoyment from running out of spawn, living for 10 seconds (not even enough time for a slayer to get Rage) then dying. After this, they're then kicked from the scenario with an implied message of "You're not welcome here if you don't run out of spawn and die."
We're trying to force player behavior rather than adapt. So how do we fix this? How do we fix low morale players in spawn while not simply forcing them to run in and die?
SOLUTION
Scenario spawn areas will now have a buff to similar to RvR Warcamps where players receive x% reduced damage and deal x% more damage.
Let's spitball and say 50% DR and 30% more damage. Between this, safe flanks, and cannons in the warcamp, the spawn is now a safe zone and while organized groups will likely still camp it, there's a very good chance that with these effects in place, a spawn camped force can get a kill or 2 and break the spawn camp, pushing the fight back into objectives. Players will very likely adapt and learn that they can push their limits while within this area and the ebb and flow of battle begins once again. This isn't even a hypothetical fix because the warcamp buff is already in the game, and this already happens.
I think another good add would be to force respawns in waves while in Scenarios, at least in the ones with Barriers.
CONSIDERATIONS
I was told that a large reason this change was made is because of premades who don't leave spawn. My method also solves this while encouraging them to fight out of a bad situation instead of punishing them. This is a game after all and players are here for fun & those dopamine hits. Sometimes premades load into a scenario that is ongoing and are already facing a spawn camp situation vs an enemy premade that already has morale built up, etc. I personally don't blame groups who don't want to push into such a severe disadvantage. That's a major flaw in game design that is again, mostly corrected by this proposal.
Of course, some players simply stay at the borders of their spawn to keep the buff and refuse to push out. This is overall unlikely (again, precedent set in RvR) but can happen and maybe something else is needed to help curb that behavior. Either way, they will lose the scenario.
Afterword
Why are less and less players doing Scenarios / 6v6 / City / Instanced Combat?
Simple, in RvR they can pick their fights, choose to engage when they have advantage, avoid disadvantages, etc. There is much, much more player agency and control in those situations compared to Instanced Combat and the modern player does not want to simply run it down & die.
Now there are ways to fix this, which are already set precedents in other PvP games, mainly by adding cooldowns (not tied to morale) to classes that allow them to:
A. Survive without group input for a time
B. Impact a fight enough to swing it
Both of these problems are solved by cooldowns, mainly defensive and/or personal healing cooldowns. Adding Defensives to classes that don't have them solves SO many problems in the game beyond even the scope of this proposal. Players complain about DPS Shaman & Archmage? Those classes have self healing & shields whereas most classes don't. Regen Witch Elf? Why play that when you get a cooldown that lets you stay alive and still be a standard, functioning DPS Class?
Food for thought, Thank You & Best Wishes,
Uchoo