Make the shield regen rate the same as halo reach’s so you don’t die as quickly, and because it’s canon as well.
That’s how it’s supposed to be. Canonically, the Spartans in Reach were SPARTAN III’s, whereas Master Chief is a SPARTAN II. In Halo 2, Chief got the armor upgrade which sped up his shield recharge rate.
Thats the same recharge rate as the original game which is what it should be. That should not be changed.