Well, in the past, the school of aikido that I had been training at (Shodokan -Tomiki- Aikido/JAA) did not offer any sort of internal training. The drills and exercises we did outside of technical training pretty strictly focused on developing physical abilities, timing, ma ai, etc. And, I have to admit, that when I was really training at that school, I was dismissive of internal training concerns, wanting to focus on my technical development only. However, as I'm now training in the Jiyushinkai system, and am slowly being introduced to all that the organization has to offer, I'm definitely becoming more open to different approaches to Tomiki aikido, and will make a point of discussing it with my instructor.
Sorry to hear that. I've been privy to some yet unpublished info that indicates (at least to me) that Tomiki was one of those who did develop quite a bit of the internal skills while training with Ueshiba M. This was at a time when things were still taught as Daito Ryu / Aikibudo. Apparently the internal development and Aiki training for Shodokan was blended within Tomiki's theories and training methods on Kuzushi. A recent seminar with Shishida Shihan provided even more information on this for my own training. A lot of what Shodokan calls "warm ups" and "drills" include internal training elements "hidden in plain sight" an example is Shotei Awase when done properly.
Having said that, I know many Shodokan dojo focus on shiai and competition-specific training and if this is ones primary focus one can forget about developing internal skills imho. This is funny however, since resistance tanto or toshu randori provides a very good opportunity to test ones internal skills and Aiki imho both as Tori and Uke, simultaneously.
The Jiyushinkai are really good guys however. I respect what they do a lot. Would love to train with them sometime.
Happy training. Hope you find what you are looking for.