It’s great that EI have finally managed to get a functioning EI branded booking portal for reward flights. It a shame that you cant view your AerClub account details or combine Avios. But it’s better and less buggy than the old avios.com pages were. There are still a few quirks with the EI portal and opportunities to save. EI short haul is still cheaper via the EI portal than on ba.com. EI short haul was roughly at BA Reward Flight Saver prices and thats is still the case. However EI metal booked via BA is quite a bit more expensive in terms of Avios and cash. So watch out.

For a return LHR-DUB in Economy BA.com offers the following:
BA Services (Reward Saver)
18500 Avios + £1.00
17000 Avios + £ 9.00
14500 Avios + £ 18.00
9500 Avios + £ 35.00
7400 Avios + £ 65.00
5900 Avios + £ 85.00
EI Operated
8000 Avios + £ 63.44
7352 Avios + £ 69.10
6270 Avios + £ 76.94
4108 Avios + £ 93.44
3200 Avios + £ 103.44
2552 Avios + £ 113.44

EI.com
8,000 Avios + £39.44
7,352 Avios + £49.44
6,272 Avios + £59.44
4,110 Avios + £79.44
3,200 Avios + £109.44
2,552 Avios + £129.44

EI appears to be pricing their short haul flights similarly in terms of Cash and Avios to BA, but only on the EI portal.