Aer credit card

It's just a basic calender to select from,it isn't a reflection of availability or when flights take place.
It's a dated process , should be better like booking flights with avios points showing live availablity 
But with either you still pay taxes and fees 

There's no value in using the flights for that type of booking, needs to be longer routes.

Which is useless if you aren't going somewhere longer!

Does anyone know what sort of validation they do for the fast passes? Ideally I just want to use the fast track security but not priority boarding on a non EI flight

But are they actually linked? Boarding card is scanned at all security, if it's just a generic fast track voucher, it's not linked to a boarding card

Balance Transfer:

• Introductory Rate: 0% interest for the first 7 months on balance transfers.
• Post-Introductory Rate: After 7 months, the fixed interest rate reverts to the standard variable purchase rate applicable to the card.
• Standard Variable Purchase Rate: 14.00% annual rate. 

You don't earn any points on transfers

I agree the limitations are overly restrictive- but they do make that clear before you sign up. The T&Cs do say:

ii. Availability is restricted during holidays and other peak travel periods, including but not limited to bank holidays, school holidays and sporting events. For example, Free Fares will be restricted (and may not be available) on certain flights during the dates and travel periods…

• 24June - 31 August (Fridays/Saturdays/Sundays)
• 20 December - 06 January
• February/October midterm breaks
  (Saturday/Sunday)
• Easter (Good Friday - Easter Monday)
• Six Nations Rugby matches (flights to the destination of the matches may not be available on the day of the match and 2
  days either side of it)
• Other Irish bank holiday weekends (Friday/Saturday/Monday)

They only make a number of seats available for free flights on a flight

So in theory, the flights you wanted could of been restricted to two seats etc and were already taken by another user.

The restrictions don't suit everyone

There is more availablity for flights using aer points , they were to switch to a annual points gain instead of the free flights , but there was backlash to the idea so they stuck to the restricted free flights. (There were other changes too)

No there isn't , it's such a backward system

Make it a available to see and book live , would free up resources for them too rather than having someone approve it etc

10kg cabin bag.

All the Avios from your credit card purchases will come through in one transaction for non Aer Lingus purchases and one for Aer Lingus purchases each month. It won’t list every single time you use your card on the Aer Club app. The transactions are clearly labelled as “Aer Credit Card (Non) Aer Lingus Purchases”.

They don't expire

They do expire if you have no activity in your aerclub account for more than 3 years as far as I’m aware

Yes, even if you stop using you Credit Card, take a flight, make a purchase on e-store or just transfer the points to BA and back again. Like cash though over time the 'value' of the points will reduce as redemption Avios will increase.