I don't get that school of thought at all. All of the changes aren't just for shits and giggles but as a natural extension of the goals of the DBP to address known balance issues or are extremely unlikely to cause major balance changes on their own but are good for the game regardless (e.g. StuG MG buff). I'd love to see your list of changes that you think are truly questionable or likely for them to get wrong and seriously mess up balance. Off the top of my head I think maybe the Conscript or Jackson changes and maybe Ostwind could seriously go wrong somehow in some unforeseen way but I think the team also knows that. But either way it's pretty defeatist to think that it's going to be bad (especially if people actually play and offer feedback)
If one only applies the FRP point changes, the repair speed changes, the commander changes and the bug fixes the impact will be substantial.
On top of that come a plethora of changes, from mainline infantry, to support weapons, to atgs ,to tanks, to artillery, to off map.
And on top of that a redesign of UKF.
A simply example is UKF trenches. When first introduced trenches for axis where CP 0. Relic then found them problematic and moved them to CP 2.
Now UKF get trenches from the start of the game that can be used by their allies in team games, it is highly probable that it will create issues.