Supply depots have long been a broken mechanic allowing people to not only switch to a suit with 100% health but also granting them temporary invincibility after they switch suits. Most of the time this isn't much of an issue because people are using it to legitimately switch suits or heal up after a fight. It's during a fight that this becomes an issue where people that are about to die can quickly switch suits and become invincible for a few moments which is usually long enough for them to kill the person that was about to kill them and it also gives them an edge against anyone else that is there.

My first suggestion is to remove the copy & pasted spawn mechanic used for switching suits so that there is no period that a player is unable to take damage after switching suits.

My second suggestion is to make it so that after switching suits you only have 25-50% of that suit's armor and no shields depending on suit type.Of course this would unfairly penalize people that are legitimately switching suits, especially those without armor reps. Which is why I also propose that after switching suits a players gains 5 or so armor reps per second depending on the suit until the difference is repped. So say a scout suit has 366 armor but after switching, it starts with 183 armor and begins repping itself until it has repped 183 points of armor; but a heavy suit with 1195 armor would start with 298 armor and would rep itself until 897 points of armor have been repped. This also should take into account any other reps (rep tool, hives, and modules) so that heavy couldn't get repped up by a logi and then have magic reps for a bit.

If it's possible for this to only apply when an enemy is within a certain distance of the supply depot then that would work out great as well. (I'm not sure how much of this would require a client side update)