Here are just some suggestions I would like to mention after some thought:
I like how we are adding communications chatter to the bombardment abilities and perhaps we can do that with orbital battles too. As a battle rages on, when the camera is in close proximity you can hear tactical chatter between vessels and strike-craft as well. For example, if a squadron is being picked off you hear quotes like "They are all over me" or "I've got your six, Falcon Seven" etc. Another popular thing is when ships are taking heavy damage, and when a capital ship is destroyed it floats there for a few seconds before detonating. In this time chatter such as "May day!", "Reactor has gone critical!" or "Abandon ship!" could be heard.
Another idea is replacing the sloop with the Prowler, or adding the Prowler. Rather than being really weak, this vessel would have a short cloaking ability and would be able to deploy LOTUS Nuclear mines. This type of Prowler was seen in the Package from Halo: Legends. I assume it is Sahara class Heavy Prowler. Or perhaps add three distinct Prowlers for different roles. Either way, I don't think the sloop is as useful as it should be, same with the DAV which could also use some kind of buff or stealth ability.
Sahara = Light Escort
Winter = Stealth and Sabotage
Razor = Recon (Sloop Replacement)
From now on I shall be posting any further small suggestions from me on this thread.
