I'm not sure how easy it would be to implement this, but I had an idea and I'm not sure if anyone has suggested it before.
As you know, some maps like Setons need full share turned on to prevent games being effectively done after 5-10 minutes when the mid player dies, or after 10 minutes after the air player dies. But of course in many such games, the next highest rated player inherits the dead player's base and eco's twice as hard and often dominates the game because of this. This is probably still better than the whole game being effectively over for everyone, but it's not ideal and it discourages sniping.
My suggestion is either:
Implement an 'in between' option, where the dead player's eco (mexes, storages and power) get destroyed, but the factories, units and engineers stay alive and get transferred to the next player.
or
Implement the opposite of this, where the dead player's units (engineers, tanks etc) get destroyed, but the factories and eco remain and allows the inheriting player to rebuild quicker.
Either of these would still make it an uphill battle to re-establish the position, but it wouldn't make it completely impossible to recover like it often is when the entire base disappears and enemy units flood in before anyone else can respond. It would probably provide better balance in games like Setons IMO. So my question is... can it be done? Is it practical to do? Is there interest in doing it?? Would it need to be a mod or could it actually be implemented into the main game as an option alongside full share and no share?