The biggest problem I see is that SCH uses too much of the ACN toolkit to separate it without either creating identical skills or completely changing the way SCH plays. This was an issue back in 2.0 when they admitted that there were problems with SMN but had a hard time adjusting it without also affecting SCH in the process.

Minus the pet's abilities, there are only 10 skills that separate SCH from ACN (the 10 job skills), and half of those are fairly situational.

For the bonus stats split, unless you are OCD min/maxing, either invest it all in the job you mainly play (Int for SMN, Mind for SCH), or split it between the 2. At current gear, I have over 1500 Mind, 17-18 points is not going to make or break you.