The amount of pension you get is based on your pensionable pay. Which is basic pay plus pensionable allowances(if you get them) minus the LED for section C members of the RMPP.
Paying into pensions/AVC's, and the new partnership & matching share plan all benefits you in the form of lower income tax via tax relief and/or lower NIC's via PSE.
The effects of PSE on pensionable pay is covered in the Q&A's in the PSE booklet, where it says:
Your pensionable pay stays the same if you take part in PSE. This is the amount of your pay that is used to work out pension contributions and pension benefits under the rules of the RMPP or RMDCP. Pensionable pay differs from basic pay depending on which plan you are a member of, and if you are an RMPP member, which section of the plan you are a member of.
So paying AVC's SAYE, etc shouldn't have any effect.
To be honest I don't know if POAL affects your pensionable pay, but I've never seen or heard it mentioned, so I assume not. Have you noticed any reductions in benefits on your annual pension statements or the 'pensions contrib pay' on your wage slip as a result of POAL or anything else?