It would be really fun to have 3-4 EW tanks, from the British cruisers and Matilda, German Pzr Mk III, and Soviet T60/70. Mix in the 6 pdr, 45mm, and 50mm tank guns in there and give them some of the high velocity LW ammo available so that they can compete in the LW arenas and scenarios.
I think it makes sense for HTC to NOT add in the 2 Pdr size guns, but instead to keep branching opt 1 level at a time. Meaning the 2cm, 2 Pdr/40mm, etc is too far of a gap from teh 75mm standard we have in AH currently. However, come "1 step down" to the 5cm and 6 Pdr/57mm level and they can still compete to a smaller degree, but more so with the LW high velocity ammo. I say add in those tanks with the 5cm-57mm guns, and give them a few rounds (5?) of the HV sabot stuff and call it good. THEN work with the true EW tanks.