Enterprise Architecture: Why it won't make a difference . . .

I've been hearing the complaints from our accounting and payroll person about a new financial management software application we've just deployed.  It doesn't meet her needs, it isn't user-friendly, it doesn't have the interfaces to other software tools she currently uses to do her job.  At first I thought all of this could have been avoided if only we had a functional enterprise architecture.  Today I was reminded of a cold reality.  No matter how well we might have understood our enterprise, in the end the budget decided the solution.  We needed a packaged solution and we simply had to take the good with the bad.  I suppose that if we had a good, functional enterprise architecture we might have been able to manage expectations a little better, but it wouldn't have made a difference in the solution architecture to which we are forced to adapt.