How does it make flanking anymore rewarding when those units outside of your sweepers have a risk of being instant-gibbed at full? You're more encouraged to blob your inf with your sweepers to protect against wipes.
This change would only encourage blobbing even more. The fact that you had to spend munitions on sweepers, and in some cases, another engineer takes away resources that you can use to build up a blob of dedicated combat infantry. When I collected all the proposed changes, and added them together, it would only destroy a good game-play mechanic that belongs in this game. Squad wipes are from a completely different problem, and that problem is squad formation. I'd rather fix something that has been a problem for awhile instead of breaking something to temporarily satisfy this thread.