Yes, I have tested this.
It's simple to test really: just add swimming or shield_wall in Alexander's EDU or 1.5's.
To test Alexander's features: just use 1.5 or BI exe with alexander as the mod folder. It will CTD because of the DMB max. If you used the unique models in 1.5 or BI exe, they will be ignored.

As for shield wall in 1.5, some clever modders managed to replicate this in non-BI by changing the Loose Formation into Shield Wall (the sound is even provided) by making the soldiers gather up closer and then also hitting Guard mode. I doubt the AI could use this well (they didn't in my mod beta based on RTW 1.2) but the appearance is pretty similar but not the effect.