Where do you plan on getting those extra build points...Sorcerors need both a High Cha and a High Con (some of their abilities use this especially for Savants)
It's doesn't matter if it CAN be done the point is that on one hand their changing toughness because it was "too mandatory" and now their adding 3 more essentially mandatory skills (Heal, Repair and Spellcraft) some of which are not class skills for classes/builds that need it (ie. Bards and Palemasters need heal) it's a sloppy system and will limit build varieties greatly.