Well done @emilio123, those are some awesome gains! Full Frontal always takes a few attempts to get your pacing right an measuring AC is never pleasant as the final aspect. Here is some more guidance on pacing:
HOW TO GET THE MOST OUT OF FULL FRONTAL
If you think you could have given it some more then, I would give it a week or so and go for another round of Full Frontal. Remember though you have seen some awesome results in other sections so no matter which workout you try next it will feel more challenging.
Alternatively, you can follow @Pierre’s suggestion. Revolver is another workout which is packed full of 1minute efforts and if these don’t feel challenging enough then you can up your AC manually.