It's fine to do run-swim backwards. Unless you're really pushing the limits of your performance, it's not worth worrying about.
FWIW, I hated the TR triathlon plans (Oly, specifically). Doesn't seem like I'm alone either - at least on this forum, way more people found it impossibly hard on intensity and led to quick burnout, as it did for me. Folks seem to have had better results on the mellower IM TR plans, but I suspect they're doing only 1, possibly only 2 workouts/wk on TR as they're almost all doing their long rides outside. I also can't stand the fact that they've not updated their tri plans for what - like 10 years?!? I'd get it if everyone loved their plans, but take a look on the TR threads here regarding Oly-sprint plans, and it's clear there is a lot of (easy) changes that could greatly improve them.
Avoiding burnout, both physically mentally is key. I've done plans by Fitzgerald and Dixon, both of which didn't burn me out and got me to PR results. TR got me to a barely PR bike split, but had me beat down so badly that I much underperformed on the run, and then didn't want to get on my bike trainer for months afterwards, which is terrible!
You probably know this too but entering workouts in Zwift is super easy and works great doing them. I usuall do the interval portions in erg mode if they are hard (z3-z5) but ride all the z1/2 stuff in non-erg mode on the courses, gets the best of both worlds.
FWIW, I hated the TR triathlon plans (Oly, specifically). Doesn't seem like I'm alone either - at least on this forum, way more people found it impossibly hard on intensity and led to quick burnout, as it did for me. Folks seem to have had better results on the mellower IM TR plans, but I suspect they're doing only 1, possibly only 2 workouts/wk on TR as they're almost all doing their long rides outside. I also can't stand the fact that they've not updated their tri plans for what - like 10 years?!? I'd get it if everyone loved their plans, but take a look on the TR threads here regarding Oly-sprint plans, and it's clear there is a lot of (easy) changes that could greatly improve them.
Avoiding burnout, both physically mentally is key. I've done plans by Fitzgerald and Dixon, both of which didn't burn me out and got me to PR results. TR got me to a barely PR bike split, but had me beat down so badly that I much underperformed on the run, and then didn't want to get on my bike trainer for months afterwards, which is terrible!
You probably know this too but entering workouts in Zwift is super easy and works great doing them. I usuall do the interval portions in erg mode if they are hard (z3-z5) but ride all the z1/2 stuff in non-erg mode on the courses, gets the best of both worlds.