In my opinion and based on my experience in other games like this, the people that pay shouldn't not have advantage over the people that do not pay, payment should help you to get things more more more faster than the people that not pay. If you want an example look at DWO, everyone can have good weapons and stand a chance, the difference is a non-cash player maybe has to work for one month to get the weapon, gems, uses and gold to make it, even ask for help to someone to upgrade it, people that pay can do it in a couple of days. But once in battle, there is no difference if takes one day or one month in make your weapon.
Just give the option, farm hard long time to get it or spend money and buy it, you will be surprised how much people will pay. To make a difference, a big difference, between casher and non-cashers there is the VIP status that makes the game much more placid to play with exp bonus, VIP wheel, some candys each week and removing countdowns.
In other words, if you pay everything will be faster and placid, if not, go work hard for your stuff or gtfo. This game has not much strategy on it, but i rather win a battle cause i used the right spells on the right times than win with my VISA.
About the spamable specials, i didn't expresed myself right. I mean that before, even with PvP set you can't spam then on the first round, mages even can't do it on the 4 first rounds, now some people can open with a special and this is pretty unfair if you ask me, and i'm on the cashers side.