Gov,
Alright man, calm down there 😛
1 – Speed Endurance is not lactic tolerance work because the rest is near-maximal allowing for LA to be flushed out. You SHOULD build LAT before power. There are different types of speed endurance (and I was hoping not to get into this) such as neuromuscular speed endurance and a MaxV-like speed endurance. I'm not too well versed, which is why I didn't want to get into it, but know that when I say SE, I'm referring to speed endurance….the 3x3x60m runs are more neuromuscular-based and should be used for 100m sprinters. JJ got into this before I believe.
2 – Higher levels of lactate to deal with.