Certainly the elderly couple, plus Rosa and Darrel are new voices, plus the fruit picker guy, but whether it means some of the 'old hands' are wanting time off for other work, or for holidays, or just cutting down on work as they feel ready to retire, I don't know. No strong feelings against them (or for them), at present they seem to be more distractions.
Rather like my own nephews and niece, I feel many of the younger characters are just noise when other plots are concluded. We know little about Nigel's children right now, Ruari (?) is absent, and even Will and Nic and George etc are silent right now (not that I'm complaining... William is so grumpy with or without the assistance of Ed (who often sounds bored, or whiney).
I am a bit surprised that some actors and comedians don't just 'retire' and live their old age years more gently, rather than "work until they drop" (unless they feel that they will be more newsworthy, if they do the latter!).
As I came back in the rain from a bit of exercise, my initial thought was "Oh, it's 13:45, might switch Radio 4 on" but then after unpacking a few items and going to the loo, had forgotten all about it and here we are around 90 minutes later, idling on the computer (again!). No, Archers not capturing my attention and has not been doing since some time in early July, or before.