for sure Sparks' biggest room for improvement is some sort of forward lean 'toggle' system like on the K's... need to be able to flip from preset forward lean to 0 or negative for walk mode.
crud busting is a primary need for me and the way i ride and i don't find the hovy split to be a 1/10 at all. maybe a 5 or 6, i dunno... but for me it definitely doesn't jump out as a worthless noodle... with so much nose and such a short, stiff tail it'll pop right over most sutff.
i've said it before tho - it is not a fast board. all things being equal in conditions riding a hovercraft will lower your top speed.