That being said even though other mods have surpassed it I would say it is still very decent and enjoyable mod that definitely ranks in my top 5 so it is definitely worth to try it out. Compare that to FotR which has seen its release only the beginning of this year so it will take some time for it to rank higher.
So the fact that it has more subscriptions is more of a result of the longevity of it and it being the #1 popular mod for this game for at least 6 years I think. The modding community of this game did not have much that could compete with it for a long time as far as I know. Basically will be from the period of The Clone Wars this on television that came out between 2008-2013. Star Wars: Empire at War - Gold Pack comes with both the base game and the. The mod was playable even in 2011/12 in a for the time very decent state. This is about the time between Attack of the Clones and Revenge of the Sith. Additional maps, units, and factions available through a strong modding.
From my PoV it has only been a few years ago when other mods have surpassed it. FotR is better than RaW but this is mostly due to RaW receiving updates at a much slower pace (the core of it is still the same as it was in 2013) however RaW is kind of the OG mod for Star Wars EaW as it is in my opinion the mod that had for the longest time the most extensive overhaul and high quality.