To my mind the cheapest Mac mini is a downgrade to its predecessor.
I compared an MBA2012 (Ivy Bridge I5 1.8GHz HD4000) to an MBA2013 (Haswell I5 1.3GHz HD5000) and the newer MBA wasn't any faster. Graphics were even slower.
Now they drop the Mac mini2012 (Ivy Bridge I5 2.5/3.1GHz HD4000) to a Mac mini2014 (Haswell I5 1.4/2.7GHz HD5000). I believe that is going to be ugly in the benchmarks.
And to make things worse we are stuck another 2-3 years with Haswell, now...