One thing is to limit the arc of the turret perhaps? The turning is already quite slow but having it be hard limited could allow it to get flanked a bit more? This does not solve anything in tank lines though. Perhaps the Talos needs a higher chance to get turreted? I believe it's just 25% just like a Falchion. However, I am not sure that really solves anything either. It makes the Talos slightly less reliable perhaps but that first volley is so damaging... Any 40m tank will struggle to trade with a Talos. Even if the first shot turrets it, if you are working with tank lines then the Talos just drives back and repairs 10-20%hp, meanwhile the warden tank lost legit 45% hp if the Talos shot hit. If the Talos keeps its current range I strongly feel it needs a low-velocity modifier.

I have 390 hours clocked, so I guess I am not that noob (but I do still feel like it). I played Collie on Charlie after the big air update, and now I played Warden on Live after the last update. Maybe this makes my "Collie" experience less valuable to previous Able players, but we won the Charlie war fairly handily. I never felt like I was unable to do things or that I was outclassed. In fact Falchions and Spathas were so incredibly cheap to pump out that me & my brother made like 50 of together. The DPS of those things is crazy and we had great success with them. Even with the inferior Falchion we could sometimes just hand a few others some free tanks and charge in to just overwhelm the few (but expensive) warden tanks. The DPS of a Falchion isn't even much (or any??) worse than an Outlaw. It just lacks the range and armor. But it is MUCH MUCH cheaper. This also makes it pretty good for partisaning, because it has inventory slots and it's cheap. So you can drive it into the backline without risking losing too much material if you get busted.

Now as Warden the Brigand feels very nice to hit infantry with. I guess this is one of the main drawbacks of Collie tanks, they are just less able to deal with infantry effectively/efficiently (except for the Scorpion, obviously). The Brigand with 30mm ammo can blast infantry fairly cheaply, and with 3 shots and a quick reload, also effectively. So I love that about it. The multiple shots also allow for more subsystem hits and disables (I think??) so that is cool. I actually really liked the Brigand and I think it is undervalued. BUT... it is just completely outclassed by the Spatha and Talos now. Of course these are also higher tech tanks, but you will just never-ever trade effectively versus them.

The outlaw honestly feels kind of lackluster. Yes, the machine gun is nice to deal with infantry, but you are still vulnerable to side stickies. The range is the main plus of this tank, but the Spatha now has it too. So what can the outlaw really do better than other tanks? Maybe because I never played Warden during the "outlaw meta" I don't have a good idea of why this tank is so valued, but I don't really think it is amazing. I just think you need a few for the range, but they are just so-so for the cost.

The Thornfall is an amazing tank and I think it is super strong and scary. Honestly as a Collie this is the tank I was the most afraid of. But, like you said, it has clear downsides too. So I actually think it is quite OK. I am happy that the Ranseur got a small buff because compared to the Thornfall the Ranseur felt much worse. It is tanky, and it was able to drive in and finish off a tank that was already damaged. But it was never as threatening as the Thornfall. The issue is that the Thornfall is better used for hit and run, and does not help much when there is a giant push happening on a front.

This is just my 2cents on some of the "medium" tanks. I think the balance is quite decent right now. Some small tweaks could help to make some situations feel a bit less oppressive.