In the case of the PFM, it wasnt even technically possible on the variant we had in game as many of the things being raised related to a different radar, engine or variant entirely. Not only this, but as explained at the time and subsequently many times, the PFM event vehcile was spesifcally made clear to be representing the Soviet version of the plane which could carry Xh-66 with the export related versions covered by other variants.
We also explained clearly at the time that because the aircraft had Xh-66, that meant its modification and thus possible upgrades were clearly defined.
You can indeed go back through the PFM thread and find answers to all of the main points raised and why the aircraft is why it is. Technical possibilities are considered for balance and when we also don't have a clearly defined version that is in a certain configuration.
We have also explained that the GR.1 and F-4F both have multiple source elements supporting their weponary. So the situations do not compare.
The aircraft is performing suitably for its current BR which the majority of the community also supported it being raised too.
As previously mentioned, if you have source material to support the claim that the Harrier Gr.1 did or could even be retrofitted with flare pods, feel free to submit them for consideration. However as I mentioned previously, this has already taken place and no such pods or modifactions exist for the Gr.1.