From looking at my charts, I can see that the team is delivering about half the amount of story points per developer per week compared to this time last year.
Last year we were 2 juniors and 2 seniors. Since then we've hired 3 more seniors. We're delivering way less and finishing tickets way slower (4 weeks for a ticket now).
I don't think we've introduced any other blockers into our deployment processes, and the tickets haven't changed in complexity. The business hasn't changed and neither have the products.
What should I ask my seniors? It feels a bit bull-headed to just ask them "Why are tickets taking so long" but maybe that's what it takes?