This could also be viewed as a feature rather than a bug. Make it complex enough and maybe people will fall back to "Vote for the candidates you want to see win, in order of preference, and quit worrying about how everybody else is voting", which is how elections are supposed to work.

There's an impossibility theorem (Gibbard's) that states that for any non-dictatorial process for choosing among > 2 outcomes, there is no way to avoid tactical voting potentially swaying the results. The next-best alternative might be to make tactical voting so complex and error-prone that nobody bothers.