Ireland is not a valid comparison.
But the plans could be improved a great deal. Here are my ideas I posted elsewhere as an alternative. No final decisions have been made. Would be good if fans' meetings were held
1) Run the season from Aug 1st to March so that clubs are back in training a little earlier to help preparations for Europe.
2) 14 club league. Don't want to play clubs 4 times a year, but we need to reduce it to increase the quality.
3) Have Div 1 North and Div 1 South of just 10 clubs playing loads of local derbies in their 4 games against each other, and ensuring 2 feeder leaguies of reasonable quality below the Premier.
4) Invite all clubs playing in Wales back into the Welsh Cup, lobby UEFA to accept any of them as Welsh representatives. Make them enter from 2nd round. Make QF and SF 2-legged.
5) As they will play in both Welsh and English Cups, lobby English FA for the 14 WPL Clubs to be accepted to 1st qualifying round of English FA Cup. Cardiffs etc to accept that, altho they play in both cups, they can only qualify for Europe as Welsh reps.
6) Celtic Cup - top 8 clubs from Wales, Ireland, Loyalists, and maybe Scottish 1st Div with TV sponsorship. To make it practical, 1st Round internal e.g. Welsh Group, Irish Group etc one Saturday in Autumn. Then Final 16 in an Open Draw, QF in February in warm-up to Irish season and SF and Final in Spring.
7) Make League Cup an Under-21 Comp and having proper entrants a condition for membership of WPL (optional for Divs 1 in the preliminary round).

To fill the Fixture List - There are 36 Saturdays during the season mentioned in Point 1. 26 Premier League Fixtures + nominate 2 or 3 Saturdays for rounds of Welsh Cup + nominate a Saturday for Celtic Cup 1st round + nominate 2 Saturdays for first 2 qualifying rounds of English FA Cup + showcase a Saturday for Under-21 League Cup.
When you add Euro fixtures, clubs would have - dependent on their success - between 32 and 40 far better quality fixtures than at present with new challenges each year.