Recently after viewing a topic on these forums made about Redline Railgun tanks, the OP made a really good suggestion about how the recall mechanic could be fixed, and I thought it was so good I've decided to make a topic to highlight it, I'll include his quote right here:
To expand on this quote, if a vehicle is damaged (at all) the player gets absolutely no recall function until it's fully repaired. This would mean that in the heat of battle the user would have to jump out to repair it AND THEN begin the recall process, which would definetely allow enough time for the tank to get destroyed if they attempt that when they are being shot. Another option would they would have to escape to a supply depot, and then initiate the recall.

And if the tanker is an armor tanker, another rule could be implemented to prevent them from simply repping and recalling, All active modules would need to be refreshed before the recall is initiated as well. This would mean that armor tankers couldn't simply rep and recall because these reppers tend to have a long cooldown time.

These ideas would work in preventing mid-combat recall abuse that is frequently seen in matches, and would also hinder vehciles to have to limp away without a well-known supply depot to repair at in ambush, causing them to either carry a repair tool or find a team mate that can rep them, basically helping solve the severe vehicle spam that occurs in Ambush that's currently hard to counter due to the fact of recalls being so easy and creating a "window" for a tanker/pilot to save their asses when they should have simply died. All of this, while still making games like Skirmish and Domination work perfectly because of dedicated supply depots on each team's ground spawn and captured bases, therfore also creating a new dependence on supply depots that make them that much more valuable to defend & guard when under attack.

Honestly i think this is 100% the best solution, and the easiest to code for CCP. Thoughts?