Better post that on UTs own forums here: Unreal Tournament Forum Downtime
Although I doubt that suggestion will go well. Any player can get into that situation and it’s up to them how to get out of it without getting killed before they have means to fight back. The biggest downside of your proposition is that with unlimited invulnerability period player may willingly avoid taking anything if they are in the lead. Even having a time-limited spawn protection is a bad idea since if this kicks in for the leading player at the end of the match (even if he’s not actively delaying protection toggle), the losing player pretty much will be denied any chance for a comeback unless it’s a lead by 1-2 frags.