Please take a bit of time out of your day to read this.
I think Petrus is a lot better than people say it is.
2x2: Even a beginner can almost always plan it during inspection. Also, less moves then cross.
2x2x3: 3-gen, so relatively quick. Additionally, you can expand three ways on 2x2, while all other methods can be continued in 1 way, meaning less moves in Petrus.
EO. Can be easily recognized and influenced during 2x2x3. For around 6 moves that are quicker than alg, you open up ZBLL and take OLL algs from 57 to 7.
LL. 2L OLL works like 1L, and ZBLL can be used.
Ontop of all of this, it can easily be done rotationless. It's all 3-gen or 2-gen, meaning easier high TPS. Speaking of TPS, if you have an average TPS of 10, which is reasonable to achieve, you will average five seconds. If you're thinking, well, Petrus is too intuitive for 10 TPS, think about loopover or piano. In both of those there is nothing to memorize (I'm talking about playing a piece from sheet music, bit memorized); It's entirely intuitive, yet you reach a point where you can do it without thinking. If you average around 20 seconds in loopover, you know what I'm talking about.