I spoke to TW a few months ago. Asked them how much just internet would cost at my current speed (20mb). They told me $59 a month. This is higher than what I pay now bundled with cable. My plan is Sony Vue on my Roku much cheaper than cable, however you need the internet.
I won't be saving much but a few dollars once you figure in taxes.
As far as Charter taking over I will be surprised if they lower rates.
When the going gets weird, the weird turn pro.