Profile of Sie_Sayoka

Yes disabling replays will do a bit but wont fix an issue that would be caused by the mod itself.

If you're really committed to diagnosing why it's lagging take FPS logs of both vanilla and your mod as baseline comparisons.

Then make a copy of your mod and start reverting changes half at a time. i.e. delete half of the things in the 'instances' folder for your copied mod, then see if there's lag. If it doesn't lag then the issue would be in the deleted half, if it does lag then delete half again. Repeat this process until you've narrowed it down.

This method is known as half splitting. It's useful but only if there's a singular cause. It also wont work if the cause is from two instances in conjunction i.e. a unit with an ability. For your purposes the causes would most likely be within the abilities, sbps, ebps, or any of the ai folders so I'd start by deleting those first.

You'll want to take extra care to not overwrite your mod with the copy. Ultimately it'd take several hours to diagnose but perhaps you'll get lucky.

For lag you can take a look at this thread to get an idea of what may be your issue. The game speed is directly correlated to your frame rate and by extension your graphics card and processing power. This is a good indicator to use when diagnosing how much it's lagging and what, if any, specific units are causing it. You may want to use a program to log your frame rate.

I don't know the specifics of your mod but my guesses are:
1. Pathing. Will take up the most processing power and maps are key. A map with bad pathing will lead to lag as units will not be able to move to where they want to. If you aren't already, use a 2v2 vanilla map.
2. Test conditions. If you're using cheat commands it'd be easy to just set your HQ as invincible and go afk. This is bad since the AI has trouble moving all of its forces to attack a base, even in vanilla. In general having idle units is bad for some reason and will cause a lot of lag.
3. Abilities. Units will scan an area around them constantly for the opportunity to use an ability. This will cause lag. You can consider removing some abilities for AI with an AI specific upgrade.
4. Units and popcap. If your mod has a lot of them then it's going to compound the issue.

Diagnosing the source of lag is very time consuming. Good luck.

You can follow the mod guide if you have not done so already it will cover everything except for thumbnails.

It seems that your pathing is correct, at least for the output file. Files within the mods folder should be visible on the modding hub so I'm not sure what's going on. When you build the mod is there no errors or warnings?

Possible solutions, from easiest to hardest, would be:
1. Verify integrity of game files.
2. Make a backup and change the name to something other than ACX.
3. Make a new, blank tuning pack and see if that shows up on the modding hub.

There's a few other things we could try but see if these work for you can we can proceed from there.

As mentioned in the first paragraph to get a thumbnail (preview image) you will have to change the game version to 32 bit and upload the mod. You can change it back to the normal version and it will keep the thumbnail.

There are several different repair abilities for each race and some have more than one. Look up the engineer squad and the repair ability they have and change the values within the ability.

Sadly there's no easy way to debug that I know of. Here's a rough process of what you can do using the bisection method:

1. Make a backup
2. Start by deleting half of your instances at a time (company of heroes 2/mod projects/your mod/instances)
3. If the mod crashes it is located in the undeleted half, repeat the process until you find the offending instance
4. If the mod doesn't crash it is located in the deleted half

The above only works if there's one instance which causes crashing. If there's more then good luck.