I would agree, Emil did not have his best season but doesnt mean he is in decline! Sometimes riders have a not great season for different reasons, to repeat an old saying form is temporary, class is permanent.
For Doyle, I doubt it will take him long to get back to normal. He is very popular, gives everything for his team, is a top bloke and always has time for his fans. What is there not to like.
None I would of thought but he is at an age where crashes take their toll and probably why he hasnt ridden since. I think he probably feels he owes Ipswich a title and most likely this is their year.
Emil is usually a safe rider, he doesnt crash often, Doyle is more likely to crash but no more likely than most other heat leaders I would say also he is a great gater which helps.
That is pretty much my thoughts although I haven't known him as long as you but I have never heard a bad word said about him, absolute top bloke and a very good rider.