tracker is broken as fuck. we all know that. I would nerf it by changing the way it stacks as a multiplier, and instead give it a static time, like 2 more seconds. Tracker is really only broken on recon because of it being a multiplier, which is why everyone who uses it uses it with that class. On other classes tracker takes too many perk points and not as useful so everyone choose other perks.
for support FM I would either extend the time or preferably nerf the HP, either would work, but I believe the HP is the real problem specially on tanky classes, again, because is fucking percentage based, so tankier classes are revived with more HP.
But all in all, I think the balance of the game really went to shit when they started buffing the damage on everything. I used to be able to 1v1 preds for a good 10-15 seconds before one of us went down, now is like 3 seconds, lmao. It just makes for frustrated engagements that are no fun.
I just hope they start nerfing damage across the board on the next updates, so matches become longer.