Anivia Rework Suggestion (Change wall mechanic)

I just wanted to share an idea I've had for Anivia since first playing League. I think this change would make her way more fun to play, as well as make her more competitive.

I picked her up when I found out she could make walls. My first thought was, "oh she is like the sentry from starcaft!. For the uninitiated:

http://www.youtube.com/watch?v=QdBb4fW6_NA

http://www.youtube.com/watch?v=euULHER8YEE

Of course, it was sad to find out that the mechanics of Anivia's walls couldn't be more different.

http://www.youtube.com/watch?v=_TLLlTTE4ew

http://www.youtube.com/watch?v=qji4ngQwZ5U

So this is what I would propose:

Have her W charge stacks like vel'koz.

Lvl 1 = two stacks that can charge to create up to two small circular patches of wall. Lvl 2 = 3 Lvl 3 = 4 Lvl 4 = 5 Lvl 5 = 6

How fast should they recharge and their size could be left up to the balance team.

If they were place-able like sentry walls instead of the current less-than-intuitive way they are made, you would have a lot more room for some epic plays (and failures).

Your thoughts?