You can think of it like this: Each stat has a different cost now. You still have 8 and 160% to spend, though there's some leniency in the case of decimal spillover. (Which is why the sheet, which will round your growth rates, says you can have up to 161%)

I assume the same applies to 8, so going up to 8.5 [i]could[/i] be okay, though Rethel might have something else to say about that.

The costs are as so:
Luck: .5
HP and Skill: .75
Strength, Magic and Speed: 1 (Same cost as before)
Defense and Resistance: 1.25

The ratios are based off of assets/boons and flaws/banes of avatar creation in the games.