I wonder if anybody ever thought of making quick biscuits with Bisquick...
Funny, my Bisquick shortcake is crunchy just like quick biscuits. That's why it's so good, the crunchy shortcake, the fresh juicy fruit and the sweet creamy whipped cream on top. As far as I'm concerned the product would be a success even if this was the only thing it was good for.
Bisquick was designed and optimized for making quick biscuits, and secondarily as an all purpose baking mix. There were trade-offs. You won't get as light and as fluffy cake as when using cake mixes. If you use those cake mixes to make biscuits your biscuits won't be crunchy.
Everything considered it's a pretty good product, and can be pressed into service to make a lot of things... quickly.