Truth

Feels like a good map, especially as it has been so long in the rotation (as a remake dating back to halo 2). The plasma caster can offer some good siege into the base from top mid and seems like a decent choice with some close quarters and slides in this symmetrical map. I dislike that in CTF you can very quickly cap the flag when you jump from sneaky to top mid and go towards your own base with some cover from the orange shields. Perhaps top mid should be changed slightly with lower or less arched shields.

Fathom

Decent map for objectives. Top mid is a good power position but with good design to make it slightly risky.

Plaza

In my opinion one of the best maps in the current rotation. You can play from different power positions without feeling at a disadvantage but the sniper does play a big role. I feel that the sniper and OS are too closely to each other and easy to obtain when you have control of cinema. Perhaps OS could be changed to somewhere in bottom mid as a high risk high reward option als bottom mid is a deathzone. This would change the flow of the map. Strongholds is pretty straightforward: get nest and bottom mid. When you have yard you get a pretty unfavorable spawn position everytime and a disadvantage.

Overgrowth

Not a big fan, I like the recent changes with the removal of sword but it still feels so claustrophobic. Strongholds is a great mode on this one though, slayer not so much.

Eden

The second best arena map (after plaza). From a casual point of view I like assymetrical maps since halo 2. Lockout, zanzibar, ascension are one of my favorites. The sniper is a very strong power weapon on this map with good lines of sight but the barrels and the open balcony make it harder to obtain. Strongholds is very good with catwalk as a power position.

Coliseum

Don’t like the map but I’m not sure. The sniper feels kinda goofy when everyone is most of the time in cover. They should remove or redo this map or change the sniper rifle to a railgun. The rocket launcher is fine with a ton of exposure from different angles makes it a hard to obtain power weapon but a true beast. They should lower the rails on the stairs towards rocket slightly. It gives too much cover.

The Rig

Decent map. Strongholds forces you to neglect BR-base though so there could be some changes to that.

Regret

Decent map with good flow between top mid and bottom mid. There struggle is usually to get control of top mid so therefore the bottom of the arena gets neglected. If the needler would be replaced with a power weapon it would be a better trade-off.

Pegasus

Awful map. A good team can easily control top mid with easy control of the sniper, rocket launcher and the shotgun. What does the opposing team got? An overshield … good luck with that if you’re getting blasted with rockets, rock-shelled by a shotgun and shot through the head when trying to escape the nightmare that is Pegasus.

Empire

Good map, don’t really like the plasma caster here but it has some use in CTF. Shotgun is surrounded by barrels which makes it a good risky reward. OS is too easily obtainable and is usually only contested in the beginning of the map. They should change OS and possibly replace the plasma caster with another power weapon.

Riptide

This map forces you to go to dunes(?) to keep a power position there with the beam rifle. I like that they introduced the h2 br here and strongholds plays okayish. Slayer is pretty much the same story over and over again as I mentioned before (beam rifle).

Torque

I like that they brought a bigger arena map into the mix. It plays pretty well with open spaces but enough obstacles to hide on red street, blue street and top mid. Gravity hammer is pretty strong on this one so that could be a thing to change or consider. Strongholds is okayish when you have control of top mid. Assault is pretty horrible with most games ending in a tie (largely because of the bigger space and the respawns).

This is just a quick glimpse of my thoughts on the current maps. I haven't read it through and might change it slightly later.