This is a nice suggestion, but still has bad flaws. The first thing i thought of is that people would seek out opinions they don't support and harass others for it, all because you don't want to give the clear vision of who voted what
for example, there can be a good suggestion, but then, some popular people of the community could downvote and it would start a long argument, rather than just see the count go down a vote
Yes, the thing i would personally suggest is to have the rating like it was on youtube, Likes and Dislikes. But i don't really know, as on the other hand, you have a clear point here.
Also, polls do exist. And just think about it, wouldn't it be trashy if people had to manually check everyone? this feature could be good on really important aspects, such as changing rules or delete/start servers and stuff