I feel like when the core gets below 75% health the game completely changes to a straight fight to corner camping. When it goes below that the game is basically over. If the core is at 40% health it basically kills most chances of winning especially if they still have a fort or two left.
It feels like losing without losing and forces you to play with this inevitable feeling that nothing you do matters becasue you can’t always cover your defences while also pushing.
I think the core should gain a slow heal so that even if someone backdoors you at least have time to respond and I believe its fair because you have to choose between pushing and defending which gives the enemy time to respawn and mount a defence.
I shouldn’t feel like you may as well give up, its that sliver of hope that keeps people playing but defending an undefendable position or pushing knowing its already over kills that. I don’t think the core has to heal to full but at least restore it to 50 or 75% (slowly and after a period of not being damaged) so the defenders have time to respond.