For now, I really like the idea. The only issue I see is Assaults and Scouts are too close regen wise since they are only separated by 5 HP/s shield and no delay difference.

Example: I would like

Cal Scout: 50 regen 3 sec delay
Cal Assault: 40 regen 4 sec delay
Cal Logi: 35 regen 4 sec delay
Cal Commando: 30 regen 4 sec delay (one second depleted because that is what makes them special)
Cal Sentinel: 30 regen 4 sec delay (one second depleted delay because that is what makes them special)

This is just for Caldari though. I have other opinions on the other races which I will post tomorrow.

There's an additional proposal (that would have to come after standardization of course) to change the Caldari Assault and Gallente Assault's base HP values to correlate more with their combat philosophy. More specifically, taking away subsidiary tank HP and giving it to primary tank HP. Caldari shields are 275 and armor is 155, with Gallente being a mirror of this in it's respective areas. So, you'd more likely see a Gallente Assault with 330 armor and 100 shields after that change.

This is just one additional proposal, of which there are many that are being considered.

However, regardless of what proposal it is, it would be something that would have to come after standardization took place as it would be chaotic to balance otherwise. There are going to be some oddities and outliers in this system that will need more refined work but the baseline/foundation must first be established.