Does the EL even bring in enough revenue to fund extra players? Unless it does why would waiting make any difference?
1. Players might not come if we don't actually have euro football
2. Not sure about finances, I imagine a bit of extra tv money and qualification prize money might add a million here or there which they might not otherwise
3. Might feel that, if they don't qualify for EL, squad as it is fine for domestic-only campaign
Taking in all the above, qualification may well change what we may pay for a player. It's just a guess.