I see your problem but the solutions you give will lead to other problems.
pling: "To counter this i suggest that players rated less than f.x. 1400 get one vote, players rated between 1400 and 1600 get two votes, players rated between 1600 and 1800 get three votes and so forth."
This will lead to a situation in which the very high rated players determine the outcome. That makes the game totally uninteresting for low rated players. It will lower the fun of vote chess.
pling: In addition I suggest that the possibility to cast a vote is limited to f.x. the second half of the time given to make a move.
This is not a good idea because we are living in different time zones.
I see Vote Chess as a good way to learn more about chess. By following the discussions I see how other players think, and by posting own suggestions any weaknesses in my plans are soon pointed out to me.
However, many Vote Chess games are often spoiled by weak players submitting their votes with no regards to any ongoing discussion, or before a discussion even has had a chance to evolve. Efforts to analyse the possition to come up with the best moves are then rendered useless, and quite often you see stronger players loose interest the game towards the end due to poor play by the team.
To counter this i suggest that players rated less than f.x. 1400 get one vote, players rated between 1400 and 1600 get two votes, players rated between 1600 and 1800 get three votes and so forth.
In addition I suggest that the possibility to cast a vote is limited to f.x. the second half of the time given to make a move.