Here's a comparison of some differences between the classic Simpson's opening and the current one. This is just the moment where Marge looks to the shopping cart and sees Maggie.
Below is a more detailed analysis.
Pretty disappointing to see. I've always been a big animation fan, and rewatching early Simpsons is pretty eye-opening. The level of detail and character the animators brought to even the smallest actions helped the show become something really special, even if it was never particularly lauded for it.
If you're interested in a more thorough breakdown of classic Simpsons animation, this article is invaluable.