Why is exhaust losing the AS cripple but keeping the MS cripple?
Should be the other way around. If the MS cripple stays exhaust can still be used offensively, and with no more AS cripple, it loses a lot of defensive utility.
You should swap those around. Exhaust should be the tool to punish enemies who dive in and try to do stuff, not the tool a frontline uses to prevent someone from running so the team has a free engage onto a target.