No, McD's has publicly changed various formulations over the years. Never for the better. Even just a couple years ago when they went to "never frozen" beef for some of their sandwiches - they tasted worse IMO, but I'm sure somehow it saved McD's money.
We've got a pub near us that costs about only 10 bucks more in total to carryout from there and feed my family on burgers and fries than if we go to McDs. But we get a large hand shaped patty cooked to our individual preferences, on a bun from a local bakery, generous portion of thick cut fries, and a better experience all around.
It's insane that McD's prices are within spitting distance of the place. The drive-thru (and its related convenience) is the one and only benefit to McDs. I have reluctantly loved McD's for most of my life, but there's no doubt it's gone downhill a few times, and for sure in the past few years. If they hadn't also jacked up their prices it wouldn't be so bad, but it's really hard to justify eating there now.
They've become as infested with corporate greed as every other company of any significant size.