Corrode/Melt/Sludge need to be changed, whether or not the way they are currently written was intended or not. As it currently stands, they are worse versions of Acid Stream/Toxic Wave. They are restricted to a specific target named when the spell is learned, and they have worse drain codes. I see no benefit to taking them over the version in the core book.
Destroy [Vehicle] is listed as a Mana spell, which would make it useless, as Mana spells can't affect inanimate objects. Why is this specified as a variant of Slay instead of Wreck?
Ice Storm is listed as having Drain: Force +1, instead of Force -1, like every other area elemental combat spell.
Ram/Wreck/Demolish are completely useless. Similar to the acid issue, these spells are inherently worse than Shatter/Powerbolt/Powerball. They're restricted to a specific type of object, and are resisted by either Barrier Rating or Object resistance, a problem Shatter/Powerbolt/Powerball would not have against inanimate objects. They also do not have lower Drain values, which is what these restricted target spells had going for them in 4th edition. Hell, Ram has a higher drain than Shatter!