I fear those suggesting to make warp times slower don't realize how annoying that would be, as it stands death stacks are "punished" in a sense that the larger your fleet the longer it takes to warp. Slowing warp down further wouldnt solve any of the issues and i feel that a solution can't be so black and white sadly, the current system is on the right track to being great - so long as you ONLY look at combat in space, ignoring invasions for now..
To improve the current system I would agree with the idea that techs need to have more umf to them when put on a ship, tier 1 corvette spam shouldn't melt a fleet full of destroys but it also shouldn't be the opposite... Perhaps even a cap on the amount of ships you can have in one single fleet would solve the doomstack problem and make combat more interesting. This would of course be applied to the crisis. I bet you're thinking "well how would that work vs high tech empire vs a lower one, simple. Do not cap the amount of fleets you can have so there is the ability for atleast a fighting chance in any situation, of course if you just stack a bunch of fleets on top of eachother that's essentially doomstack but this could be remedied with something like a flanking bonus or some modifier to reward strategy and discourage stacking - for example, fleet collisions . Stack your fleets and they run the risk of crashing into eachother and losing ships.
To improve the current system I would agree with the idea that techs need to have more umf to them when put on a ship, tier 1 corvette spam shouldn't melt a fleet full of destroys but it also shouldn't be the opposite... Perhaps even a cap on the amount of ships you can have in one single fleet would solve the doomstack problem and make combat more interesting. This would of course be applied to the crisis. I bet you're thinking "well how would that work vs high tech empire vs a lower one, simple. Do not cap the amount of fleets you can have so there is the ability for atleast a fighting chance in any situation, of course if you just stack a bunch of fleets on top of eachother that's essentially doomstack but this could be remedied with something like a flanking bonus or some modifier to reward strategy and discourage stacking - for example, fleet collisions . Stack your fleets and they run the risk of crashing into eachother and losing ships.