I have to say, I don't really know Bromsgrove at all, as myself and my other half only just moved here on Tuesday!! However, we're in a similar situation with regards access to the motorway (I work in London!) and we've just moved to Lowes Hill, between the old hospital (I think it was a hospital) and the Princess of Wales hospital and are so far finding motorway access really good.
In fact, access to everywhere seems great, so we're really happy.
I know it's probably not the nicest part of Bromsgrove to live in, but I don't feel like there's any part that is bad (maybe I'm in for a surprise??!!).