I don't feel like you've really given a very good reason for removing Surge. Ive recently really been enjoying it on champs like Sion, Xin Zhao, Warwick, Jax, Teemo and other bruisers that use the AS buff to buff their abilities and have AP ratios that are fun but rarely made use of (except maybe sion and teemo). Ignite is about having a healing debuff and some extra true damage to finish the job, Surge is about increasing your combat efficiency, doing a bit more damage, applying a few more on-hits, getting slightly better heals or stronger sheilds. AP pushers can use this to great effect on towers....... its nothing like Ignite
I like that you've said that you don't like Flash+Ignite being the only thing people take but then you've gone and removed some of the other more interesting, fun and different options. "People didn't know how to use it properly", but that's because they've never tried it. Now with the nerfs on Flash Ignite, disenchanted summoners might try to branch out to some different offensive summoners like.... oh wait.....
Please, tell me you discussed this further in the Riot offices , more than just "its not used very much"