Ngr, Firstly, if you speak to pilots working for many airlines, you will discover that changes are inevitable in this industry. The majority of changes are due to your colleagues going sick, so flights need to be covered with SBY's, Contactables and swapping crew's around on flights. Other changes are due to weather and tech problems, causing delays on flights, putting crews out of hours for the next day.
It is not that crewing are deliberately trying to cause disruption to your lives, there are many factors to consider when swapping around flights and many different departments that need to be consulted first.
Perhaps if you took the time out to go and observe in the Ops room, you would see how manic things can get.
You also need to consider that Crewing have hundreds of crews to look after, not just you, so calling around every person can take time. Touch and go is simply there to help out crewing and yourselves, helping to ensure you do not get disturbed when you are off duty.
Please also remember that you have 30 mins after on blocks to de brief and collect changes. This, and any time over is included in your duty time and is what you are being paid for.
Please spare a thought for those many crew that would love to be in your situation, and would give their right arm for a bit of disruption to their roster!