I really don't see Apple returning to USB-A after 6 years of USB-C. It would be a really, really, weird move. What's next? BluRay in 2022 and Firewire in 2023? Followed by VGA in 2024 and LPT in 2025.
Yeah I like ethernet on my desktops but there's no way that's making a return on modern MacBooks.
HDMI would be a sensible addition imo, it's on almost every display device today and it's a pretty slim port.
USB-A and Ethernet would just be silly. Griping about this feels like complaining about the lack of a floppy drive in 2001.