Even with voter reform (which I doubt we'll ever get, but still), especially if it comes from either one of the current capitalist parties, the system is never going to work in our favour, it's designed not to, and "reforming" it will be in appearances only.
Just look at the energy and resources they spent discrediting Corbyn and then purging the party, and he and his peers are probably the mildest of socialists, but the status quo does not respond well to threats.
There is no escape when our only choice is between red capitalist and blue capitalist, they both play for the same team, and it isn't us.