I dint have a problem with cross breeds. I have a problem with the fact that the breeders of these cross breeds are usually twats who don't give a shit about the dogs. But I digress.
I have always had spaniels and work with a spaniel rescue. Honestly, this sounds like a disaster and I can't imagine anyone doing this ethically
Springers are highly energetic dogs, they don't stop, even if it's going to make them ill. Frenchies, often have breathing problems. You have a high probability of having a dog that has a strong desire to be active, but who can't be due to breathing issues. So either a miserable dog. Or a dog who keeps trying to be energetic and making itself sick.
Plus the size difference in the breeds, which breed is the mother?
Honestly, I am say here with a rescue cocker (might be crossed with a whippet) and some sort of tiny spaniel/poodle mix (groomer thinks the hair is very Bichon like so might be a further mix) which is another rescue.
The cocker is great. The other is a dick and I adore them both. And I take dogs on with, potential, big issues. I wouldn't touch this dog.