Li Shenron
Legend
Hard and gritty, me likes! The class and race restrictions will probably offer the opportunity to many players to actually try some more classical PC if they haven't already.
But ouch... those spellcasting times are seriously gonna hurt
Do you mean to apply concentration rules while a Wizard is spending actions in multiple rounds to cast a higher level spell? I think the casting times are already harsh enough without making the Wizard subject to disruption.
Just a marketing advice here: you don't need to openly advertise that the level progression caps at 6th. Just tell your players that so far you have more or less established your house rules to work for the first 6 levels, so they should not plan their character builds beyond that point because you are not sure the game of the afterwards. Many players out there dislike games with a sort of set "finish line", even if it doesn't imply that the game will end but only their own progression. The same players probably don't realize that the majority of games don't even reach 6th level, but if you tell them there's a cap they might get a bad mood since the start.
But ouch... those spellcasting times are seriously gonna hurt

Just a marketing advice here: you don't need to openly advertise that the level progression caps at 6th. Just tell your players that so far you have more or less established your house rules to work for the first 6 levels, so they should not plan their character builds beyond that point because you are not sure the game of the afterwards. Many players out there dislike games with a sort of set "finish line", even if it doesn't imply that the game will end but only their own progression. The same players probably don't realize that the majority of games don't even reach 6th level, but if you tell them there's a cap they might get a bad mood since the start.