I tried to play the base game the other day, just for nostalgia's sake, and it was basically unplayable, due to the 'muscle memory' of using HotBuild. So I know what you're experiencing.

Back in 2012, when GPGNet shut down, someone archived most of the available mods from the original game. They are available here:
https://gpgnet.obliteratingwave.co.uk/Vault/Individual-Mods/

HotBuild is not one of them, as far as I can tell. It definitely existed before the shutdown, as documented in this video:
https://www.youtube.com/watch?v=oCIMiX9AABQ

It was called 'Zulan's Hotbuild UI Mod' at that time. It requires GAZ_UI, I believe, which is in that archive. Searching the web was a dead end. If someone had a really old install on a old machine or a backup, that might be the only way to find a copy of Zulan's.

Nvm, I found it!
https://faforever.github.io/db/relationships.html
Hopefully, this is up to date.
Not sure I can do a table join in the client. I need to figure out how to run an arbitrary query so I can play around with it.

For the OP's problem, searching for high-rated players is about the best you can really do.
There probably are not many 4v4 games where everyone is 2000+. There just aren't many players at that level.

This was in a FAF game played offline, but I have the replay available.
I had 2-3 T2 Fighter Bombers (Notha's) on patrol. They repeatedly flew over an enemy T3 MEX and didn't attack it.

This happens around 38:00 in the replay, bottom left corner of the map.
Replay attached. There was a DilliDalli AI in the game, if that matters.

Win vs TechAI_TheDitch03-14-24.zip

Well, there's the Economic Overlay, which has always been there. It shows mass/power use of every building and unit, but it's rather cumbersome to figure out power problems from that.

Supreme Economy Next is a mod that shows your top power draws/mass draws. You can click on the avatars and it will select the units involved.

UI Party gives graphs of different categories, such as Radars, Shields, Mass Extractors, T2 Unit production, etc. Each is further divided into Using vs Building. Click on the U or B box to select the units involved.

UI Party also has a great deal of other features, some of which are bugged or incompatible with the latest FAF version. If you decide to use it, disable the 'Select Similar Assisters' and 'Unit Lock' features (via the UI Party menu, the little wrench icon). Those seem to be the source of the bugs.

You can also enable Group Stealing in the options. If you assign a tank to a new group, it is removed from the previous group.

Strangely enough, there is a 'Hotbuild' uploaded by Zulan in the Mod vault! It's from 2015. When I click Install, it does not appear to install it. However, when I checked my mods folder, there is directory named 'hot' which contains the mod. I assume the client is blocking the mod, because Hotbuild mod was 'banned' when the feature was integrated into FAF. The 2015 version appears to be a modified version designed to be compatible with Nomads. I'm going to see if I can get it working on the Steam version of SCFA.