I see what your saying, but I guess our perspectives differ over the term 'skirmish' so let me rephrase. Any engagement involving a few tanks and less than 100 guys a side is a minor encounter. If you call in the air support - you tip the balance and the dynamics and feel of the game change - at least they have for me. The size of a standard game of 40k does not support the inclusion of flyers in my view and has spoilt what was a very good rule set for minor engagements of armour and infantry.While I understand that sentiment, 40k has not been a skirmish game since 2ed. When they changed over to 3ed and standardized movement and removed most of the individual model level customization the whole nature of the game changed. Battles became larger overnight.
If flyers were what put you off the game in the changeover from 5ed to 6ed then the problem is probably not the scale of the game.