KR re the Tuesdays they are approximations and maybe on the generous side but with the reps, the recoveries and warm up and warm down they should be able to get close ie with a 2 mile warm up including strides etc and a good 10 minute warm down etc. The mile warm up and warm down are minimums.
Just to clarify re paces they are rough guidelines not essential to get to too close except on the key sessions and certainly the original schedule had numbers rounded up, and where the schedule said things like 4 x 1 mile or 6 minutes, it didn't mean you have to run the miles in 6 minutes - just if you didn't have a measured circuit run for 6 minutes and stop. It wouldn't matter too much if the distance in the time might have been short. Also if you ran the reps hard and you ran an accurate mile and only ran say 6:40, it wouldn't necessarily be a problem in ultimately running a sub-3:15.
Each week and each session should be run at the right pace and effort for how you feel that day and not necessarily the exact time on the schedule. Sometimes that may be slower than down and occasionally faster if it fits into the week plan.