I am glad you appreciate.
First of all Joel, don't be confused if you get different opinions on what to do. Different coaches having different experiences, may end up with differents ingredients, the recepe shall still be good.
Your performance on the first event (160k in 4:18) is very good. Not knowing about your other performances, I just have one point on the chart. I know nothing about the overall curve. But we probably agree on the fact that your LT and AT have still room for improvement. This year, and for the next couple of years.
You climb on the saddle. And in the same time, you mention it is a weakness. But in your next event, you say there is not gonna be that many hills.
You may want to favor continue climbing on the saddle in the next event. But to improve your overall performances, try to exploit cadence (velocity), rather than force, to climb those hills. I know good climbers that climb 8% at 85-90 RPM. For what it is worth of course.
Hamish mention that Low RPM high resistance training can turn into speed. I don't directly see how, but if he says so. It is probably true I guess. He really knows something I don't.
But what I do know for sure, is that LT requires maintenance. Not that you can totally loose it, but to stay really sharp, it requires good care. I find it is the first thing that tends to shade off if neglected.
Now you mention both LT and AT. I assume your LT is at around 2 mmol/L and AT at around 4 mmol/L. Forget about those numbers. Lets think LT 60min, and AT40min. Your LT workouts are not supposed to be speed work per se. It is supposed to be a bit over your race effort, but not that much. Long intervals (10-30 minutes) are better I think. Or even 40 to 75 min TT.
So when you think LT, think longer efforts. Be more specific to the distance you wanna race. It should only takes a day or two before being able to do quality again. Make sure you take an easy week, every 3 or 4 weeks.
Frenchyge mentionned about tempo training. That is your racing intensity. So... I think it's important. You need to ride at that intensity, to master it, and to allow your system to metabolize as much fat possible. Test your feeding protocole also.
Read RapDaddyo's comments on the thread about sprint programs. You'll see that he favors long rides with a salad of different working intensities, with proper rest at base intensity in between. Two peaks, separated by two months, that may be a good approach, to blend everything a little more, both to maitain the base aspect, as well as the specific aspect.