The shield recharge speed seems too low in both war games and Spartan ops. The engagements and re-engage time is to fast to have shields start recharging at such low speeds. Many times I find myself finishing a fight but even if I hide, my shields haven’t recharged yet and I have to engage. With sprint, instant respawn and all that, the game increases engagement speed. It’d be also nicer in Spartan ops to have faster engagement speeds go make the game faster paced.
Basically, the pace of the game is high, but the shield recharge time, downtime, is too high, should be lower.