Well there are much different onchain votings systems, some better then others i think coins like Tezos and Decred are great, prevent forking and also let people help taking decisions.
Gamed voting is mostly cause people create a system where people dont have to put their money where their mouth is, thats why for exemple decred got tickets and tezos a bond and roll.
This will let people have more good intention for the voting cause they actually have to own the coin and put it at stake. Tricking this system is expensive and also put your own coins at risk.
Like i said its experimental but we def. going to have a look at it.
Of course, this is your project and you should do what you feel is best.
I just wonder, maybe it is too early to talk about voting when looking at the present state of dApps it is hard enough to build a community in the first place. Even the most popular dApps have only a few thousand users in a single day.