Likewise.

Funnily enough I played RTW on default speed without any problems. I must be getting old.

I noticed the same thing. I like to park my yari ashigaru line, turn on spearwall, and let skirmish mode on the archers do the rest. Automatic horse kebabs. Heh, the AI doesn't always play along. Often enough to keep me from getting confident it will do something which forces me to work hard to recover the situation, like sneak a fast unit or two around the back of my line while I focus on the kebabbing, or swerve at the last instant so it catches unit flanks. Sometimes it will halt and withdraw and try something else. If it has the right infantry types it will sometimes follow a cavalry charge up with a close infantry charge. Samurai smashing into lines still recovering from impact is ugly. A few times there have been so many horses hitting in slightly staggered charges that my line became overwhelmed; an immensely costly way to remove some ashigaru but I guess it worked.

I love it! Much better than the AI which used to do the same (typically stupid) thing every time. 50% chance of automatic horse kebabs and 50% chance of mayhem is good.