Notice that jiriku mentioned he wanted to do the Healer "in the flavor of the original", which means he intended to make it Wis-based prepared spellcaster instead of spontaneous specialist (which is the term I use to distinguish sorcerers and bards from beguilers, dread necros and warlocks). To resemble the original, he needs to make it a prepared spellcaster.
If not, and if he had the capstone you suggest...well, notice the first spoiler he has? That's basically suggesting he rips off my job; he decided that the capstone (basically, having none) and the abilities would be strikingly different from mine, echoing the original (which was basically prepared spells, a plethora of spells cast as spell-like abilities 1/day, and the unicorn companion which was the only ability that really progressed alongside spellcasting).
Besides, the class does have a capstone...basically it ends a chain of three level based abilities, gaining a plethora of spells, more powers, an extra feat and one more 9th level spell. Just because it doesn't have a named, unique capstone doesn't mean he doesn't has one (the level is quite certainly not-dead, and adding a capstone to that 20th level would make it really cluttered)
jiriku, one thing tho: text states that you learn new spells at 3rd level and then every 4 levels afterwards, table states you learn new spells at 4th level and then every 4 levels afterwards. Does 1st one apply, or does 2nd one apply?