Do people really think only 1tph in each direction is the total demand?
Liverpool (+airport) and North Wales are hugely linked, and I think there could be a lot of suppressed demand. Wrexham could have a service at 1tph and then you could have a fast and a slow (say all stations to Chester, although that could be the Wrexham) - you'd want to serve Llandudno but then Bangor and Holyhead might be useful too. I could see this supporting at least 2tph each direction, possibly 3 in the longer term.
I repeat my earlier post - what would the timetable look like?
You seem to be suggesting (as a minimum!)
L/pool - slow - Chester - Wrexham
L/pool - fast - Chester - Llandudno
So are these in addition to, or replacements for, existing services west of Chester?