Hi Indy,
I'm currently in the 3rd meso, and have done it all without taking my 1RM. I wouldn't say the program has been a waste for me, at all! I have gotten good results (toned arms, tight glutes, some muscle definition, etc.) with just lifting as much as I think I can for each meso.
I would do the rotation again though, and do the 1RM next time. It slows you down having to keep track of what you've lifted in the past so you can progress. If I'd taken the 1RM it would be on the workout cards that you print out from Cathe's website, which I'm still printing out and filling in the blanks for each workout.
It's smarter to do the 1RM, but I didn't want to take the time. But, it's totally up to you! If you don't want to mess with it, you still get a very good workout using your best judgement on weight selection.
This is such a good program, even winging it, you'll see some changes in your body if you're using your weight to the best of your ability. It might just take a bit of experimenting the first time through or on a few of the reps. If the weight feels too light, grab another one instead!
Either way, it slows you down a bit by taking the 1RM before you begin the program, or it slows you down while you're doing the workout, when you're writing things down and having to change weights.
Don't let not taking the 1RM keep you from doing the program! It's terrific!