Yes
That's right. I have read most (that I know of) high quality and technically accurate advantage play systems blackjack books over the last 20 years including Thorp, Griffin, Revere, Humble and Cooper, Wong, Snyder, Blackwood, Carlson, the MIT Hi-Lo system material, and last but certainly not least Schlesinger.
By the way I would love to see another revision of BJA or some completely new material from you. Emphasis added!
If you read Renzey's BJBBII it has a completely different flavor than all other systems books and it is technically accurate.
It really does have something for everyone that wants to reduce the edge during recreational play, or get the edge for the more serious blackjack aficionado.
He explains some of the plays aren't that strong but the range of strategies he published are from easy but admittedly weak (board reading), to professional level systems like the Mentor Count and his unbalanced KISS strategies. The ace/ten front count he explains could be taught and employed by someone with even a marginal degree of motivation and aptitude.
Personally, I'm a recreational counter. I first learned the RPC and have many fond memories of solo counting the reservation casinos in MN when I was younger. After a long hiatus during the military and college I regrouped and switched to Snyder's Hi-Lo Lite because it's easier for me to get up to speed after my breaks from blackjack due to life's circumstances.