As an American you should be used by now to being told that even the smallest (and sometimes imaginary) achievement is called "huge" or "wonderful" or "Beautiful"
You might be interested to know that in the beta release line versions 1.8.0.xxx ( the xxx is for beta increments) are being announced.
I agree that the the updates in 1.7.2 were probably significant enough to warrant an increment of the second version number, but be grateful that Affinity are rolling these updates out quickly - maybe they had already started work on the 1.8 line and wanted to get the improvements out quicker.
See the updates in the following thread:
Great tool, great that we are being given more real improvements - just dying to see support for Canon's EOS-R raw files (and I know that has to come from a 3rd party).