I just checked out Double Trouble yesterday (wanted to finish the Fire Emblem DLC and Tokyo Mirage Sessions first), and the first couple of maps I tried I wasn't really pleased with, but other maps have been much better. Some general thoughts:
- Definitely play this co-op if you can. It just seems cumbersome to play by yourself, especially on some of the maps for reasons outlined below.
- Most of the maps generally have two "fronts" to them. Playing by myself, I found the maps with the units from both commanders mixed together was more annoying to manage. I would keep trying to move units from the other commander when it wasn't their turn.
- However, the maps that have the two commanders' armies either completely split or mostly split are excellent in single player. The first map against Heavensong (vs Ryoji) was great as it felt like both Wulfar and Errol & Orrla both had different roles to accomplish that helped moved the mission along. They did something for each other that didn't have the annoyance of just units mixed together. I liked the idea of using Errol & Orrla's hideout to get more money to them from Wulfar's side.
- The new units are great. Thieves are an interesting mechanic that can neutralize buildings fast, as well as get you triple value of the property that it would gain in one turn. Thieves are kind of expensive, and understandably so since they can instantly neutralize properties. I haven't tried it yet, but I am guessing you can't neutralize strongholds, you only steal gold from them? It's a neat idea to be able to directly attack economy like that. Riflemen are interesting, and can potentially be very strong if you position them right, but you really have to spend their turns wisely with their ammo mechanic, and limited movement.
- I haven't tried out Vesper yet, but Wulfar's groove has a lot of neat uses. I've applied it to knocking a trouble unit into the water, knocking one of my units into the enemy units to cause some damage, or just knocking enemy units into other enemy units. I can see this being a lot of fun in multiplayer.
- Errol & Orrla's groove is going to definitely be difficult to be use in multiplayer, and I imagine for a lot of people will be prone to error with it. The first time I tried using it in the campaign I ended up burning Wulfar and killed him :( I understand it better now though, and can see an Errol & Orla on a team with a Emeric being brutal.
- New balance changes are quite welcome! Spearmen got the much-needed nerf, doggos are viable outside of fog of war maps now!