I notice one thing with most delayers and laggers in spar. Almost every delayers and lagger I go up against almost always spar exactly the same, as if I'm sparring the same few people over and over.
Besides a select few, most delayers and laggers cannot evolve in spar tactically. They figure out that they can simply go back and forth in that defensive c-style and see that they're winning doing it, since the ones with more stable connections have a hard time hitting them. I see that they get stuck in a pattern but are still relying on simply defending themselves for the most part.
Besides Droon, Saeed or Sarah, every other delayer seems limited in any tactics or tricks, there just becomes one point where the delayer doesn't know how to truly predict and simply goes in a direction, in c-style, and hits to find that it works. Not every person has exactly the same latency, either, and that's what throws everyone off a little. Ye' could go against someone from Brazil who can be hit 3-4 tiles in front of where their actual character is and someone from Spain could be hit slightly more or less. Just examples but you understand, I hope.