I do not worry about any perfection in our “lawn” around the house. It largely blends into the pastures where we graze sheep and poultry. However, we do need to spot seed from time to time to recover heavy-use areas and around bale feeders.
The areas we need to address are small, otherwise I would be hesitant to do much until late August. Spring seeding comes second to the preferred late summer timing for complete lawn renovation or seeding a brand-new lawn.