I have shared your suggestions with my provider (Lemo) and their response was "We can reduce some country's channels because the package is too heavy, You got the whole playlist which is too heavy for your device to handle so we have to reduce it according to your preference."
This doesn't make sense to me as a) I'm sure the U5 can handle a lot of channels, and b) it's been fine until now.
Nonetheless, I've had them reduce the number of channels by eliminating countries I'd simply never watch, and it seems to work now. But I don't understand.