Hello G MAn
I know where you are coming from in some respects - some of the changes they have made have not been well thought through and can make it nigh on impossible to offer clear sensible advise (Does IR35 apply? being a good example)
I agree some parts of the revenue offer shocking customer service if you need any sort of help - but if they can replicate the system they have for agents with self assessment quries in other departments things should imporve over the next 2 or 3 years.
However overall - i am probably happier than ever as far as the future is concerned.
IWeam currently swapping all clients to online filing for vat - i have not had one client who is not happy to pay by direct debit once i have explained how things work.Extra 10 days etc.
We filed our first CT600/Company Acounts online this week - the return was processed overnight.
Completing self assessment returns online is a million times better than the old complete a paper return method where the revenue loved to change as many boxes as they could given half an excuse.
In some respects if tax becomes too simple then we would not be needed as accountants

I do have to say though accountancy isn't an easy profession and i can imagine that there are probably alot of other jobs that you may be able to do for as much or more money that do not provide the same levels of potential stress.
In some respects penalties for late payment of paye are long overdue - individuals/companies do take advantage of the system and due to this changes need to be made.
Most businesses may not like vat but manage to pay this on time while often leaving paye for months or longer.