Very well thought up as well. Sadly it will be several months before I can add into the discussion about C.A. but hopefully by than there will be updates to make them even more viable.
Some of my own thoughts. I don't think anyone will ever use mortars seriously. I've used them for laughs but no amount of updating will make them worth using in war. Their A.I. is too unpredictable to rely on them. Commandos can be good but against high level bases you will never see them. Moving faster would help but they will just cause all the troop buildings to spawn and likely die to a trap. I think if machine gunners could shoot over walls they would be more useful. While they can attack over walls indirectly just because of splash, they have to shoot out walls to get to whatever target you choose for them. The range increase would help a little but they are still too limited to stop anyone even with their troop suppression ability. With bombers, you'd have to increase the HP a hell of a lot to make the worth using in war. Similar to the issue with transports, that if you're fighting an enemy that you know has stronghold troops, you lose the ability to attack them directly. At least the bomber has a better chance at least to deal with the troops. The only thing that will likely happen if the bomber was buffed would be they send it on a run to kill the silo successfully but it'll probably get killed right after. Perhaps just use the bomber away from the heavy defenses to keep it alive longer but that would also defeat the purpose of having it. All these units above, I know they can be integrated into your army by using a small amount but as someone mentioned above adding just one or more of a unit adds another tab at the bottom of the screen and that does mess with some players having to scroll left and right to select troops. I use some of these troops but only because I use the troops cards like demolition squad and etc.
Actually armored aren't a completely bad unit. For MP I don't use them much as Id rather use motorcycles to save the oil. You can use the armored cars to raid you would just have to be more selective on what bases you attack. They have more damage/hp than the motorcycles so they can steal more oil and make up for their cost. We donate them to some bases in war because it's a nice surprise as every usually expects the howitzer type unit inside. Everyone has experienced the armored cars troop card in strongholds so you already know they can be beasts on defense. We also have the alliance perk (I think level 9) so we get back half the oil used for the unit so it's not too bad. If we think that it will help us in war we will do it (While not spending actual money). It's worked a few times and not worked a few times. Shorter range than the howitzer and no splash but double the dmg and hp and it moves much more quickly so less chance of being shot down by planes. Obviously it takes the right kind of base and yes yes, there's decoys or sabotage or blitzkrieg but that's always going to be true.
I agree with the troop train time decrease. When that troop training event was on, probably the best time people have had in a while. It all boils down to the pace of play issue. Because bases are getting more defenses and also because of the "Silo" attackers have been experiencing more losses than before so there's also a longer wait to attack again. Even for those players that just say "Attack better and stop whining," I highly doubt you're attacking every opponent you find and probably find yourself clicking the "Next" button more often just to find someone you can take down without as many losses. That has always been the case, it's just that your clicking more than you used to. I dropped my medal count considerably to compensate but I understand the problem.
If any changes are made regarding any of the troops, I can take it or leave but it's true that game gets quite stale especially after playing so long. The pace slows down and as it's been discussed you really only have 30% of the units to play with because most become rubbish up to a point or are rubbish to begin with. Mainly I still play because of the people in the alliance and most of the time we aren't chatting about the game itself.