I think a bigger issue than the TA in the UK is the presence of stepped climb SIDs at a number of busy airports with equally busy GMC positions. First stop altitudes are frequently bust - and I understand that the charts used often don't help in this respect.
I agree, some of those departures are spring loaded for a bust with complicated hairpin turns, at or above and at or below and mandatory altitude constraints and speeds just as you are trying to get a heavy (or sometimes, even worse, light) aircraft cleaned up and accelerating. And, don't forget to set QNE at the low transition altitude, deal with the altitude captures and comply with local noise abatement etc.
There are a few wacky U.S. departures but even at the largest airports many departures are simple vectors with a climb to 5000 feet. This gives you time to concentrate on flying the plane in those critical first couple of minutes.