British Columbia's Dr. Bonnie Henry discusses [1] (5min YouTube clip up until 28m37s) the decision process surrounding Adverse Events Following Immunization (AEFIs) [2] within the context of the EMA decision involving the AstraZeneca vaccine. Her explanations tend to mirror her refrain "Be Kind, Be Calm, Be Safe".
For those jurisdictions like the UK, India, and Canada that continue recommending AstraZeneca, I'd suggest that COVID-19 vaccines are like beer; the best one is the one in front of you.