I beg to differ
If that would be a struggle, then your general fitness is too low.
Once your season is done - i would be looking to increase your general fitness. General fitness improves very quickly.
Charlie has mentioned many times the reason to have a good General Fitness platform. So i need not delve into that.
There are reasons why it may take longer than 4-6week in the off season to get your general fitness up, Such as being muscle bound from too much Weights or just being FAT. Good time to diet is during this period to drop the kg’s.
You need some volume in your legs - 2k of tempo is in all reality pretty easy. 1km barely moves the blood.