Alternate spell system

 Sleep level: 1.2  or 1.3
making it a 1st level spell but can't be learned or memorized untill 2nd level or 3rd.
other spells that people have problems with can be notorized the same way
so fireball 3.7 for example.
Sleep spell does seem to be really the only one thats a problem to people and
when thats removed then they dont like magic missile.
and when I say people, it's some DMs, they don't want mages to be knife fighters
or this or that, they lament firsties weakness, wanting them to be more wizardly
trying to come up with something to make them stronger, then take glee when
the player rolls a 1 for starting hit points and how old school it is.

  I thought of this after reading other posts around the internet of people changing
spell level of spells, rewriting spells and having spell points and other nonsense.
never seen where level of caster was a prerequisite.