welcome back.

I'm not going to get into the definition pissing matches but rather try to focus on your question. I'm not sure if the data you have here is skewed to over represent your 5/20/60 minute power due to having more sample size from training, that happens sometimes due to just targeting those and only having the 1' and 5" on racedays (so your wattages might be lower as you're not doing those efforts as fresh as you are the workout efforts), but based on what you posted, you appear to show greater proficiency in the "aerobic" areas than the neuromuscular or anaerobic work capacity areas. even with that, I'm still not convinced that 1' MMP is the area to focus on. Others have written this, and I would agree, that doing work that forces you to put down hard efforts when you're tongue is already wagging is probably the area to work on, examples would be things like tempo with a 10" sprint every 3' (something like an hour of power); pyramids where you do something like 1/3/5/7/3/2/1 with = rest; multiple sets of 4x40" hard/20" ez; multiple sets of 8x30" hard/30" at zone 2; or other similarly structured sessions. the key being to force yourself to go deep when your system is already taxed. The tricky part is to fit those into your workouts to get benefit without mucking up being fresh for your racing. If you're racing on weekends, I'd hit these on a wednesday, that way you have thursday and friday for recovering.

even with that, it might not be a physical or training thing at all, you might just have yourself cooked at the end of races due to not racing properly for your fitness (i.e. chasing everyone and everything all race long, spending too much time in the wind, leading the pack around, being on the wrong side of the pack relative to the wind, pack comfort issues, etc.). correcting those aspects of your racing can result in "free" watts to use at the end when it's go time, so consider how you're racing as well.