I wonder what the ideal is. If we get to the conference league final it will be our 57th game this season. Given the dates for the first game and that final we will end the season with that average being around 122hours. It's pretty clear that has had an impact on the squad but it's an unavoidable consequence of having a good cup run in Europe. No amount of scheduling changes would alter the fact that 57 games in a little over 9 months is a lot to squeeze in.
Clubs like spurs haven't got lucky to have a much longer break between games, they weren't in Europe and went out early in both cups meaning they will play 15-16 games less than us this season.
If there is any fortune/misfortune involved for them it's that they've been scheduled to play successful teams on weeks where those teams play in the latter rounds of the cups which leads to rescheduling and makes their fixtures a bit 'clumpy'.
As others have said I'm sure they'd have preferred the games too be more spread out as that would make the most of the advantage of fewer games.