200 channels of rubbish? I don't get anything like that many here in England.
I only have about 70-odd channels of rubbish to wade through.
The short delay is largely irrelevant while watching TV unless you really want to set your watch by the start of the BBC news. The exception is where you have several TVs on, each with different digital tuners, because each will have a slightly different delay.
I always found the text on analogue TV painfully show as you had to wait until it got round to transmitting the one you wanted. The version on Freeview isn't particularly fast either, but I rarely use it for anything but the weather.
I don't have HD, so can't comment on that. If you get frequent interference or drop-out then there are two things to look at. The first is a better aerial, and the second is to hunt down sources of electrical interference. Domestic appliances with thermostats can be a particular problem when they turn off.
They should be re-shuffling the channel allocations and boosting the signal once the analogue one is turned off. You may find that any interference problems fix themselves at that point.
DAB digital radio is notorious for its low bit-rate and poor sound quality compared with good FM reception. Strangely, radio on Freeview has a higher bit-rate and so better quality than DAB.
S P Barker BSc PhD MIET