Question is really simple…it’s a fact that other vendors are looking more in the 2.5G since more and more domestic equiment now support it, even new minipc comes with 2.5G eth or most of the Access Point for WiFI 6E or 7
So…what about a device with
4 X 2.5G
2 X 10G SFP+
1 X 10G Base-T (eth, or even two of them)
First 5009 release was back in the 2021, it looks like it’s a great moment for the successor, otherwise I do believe most of us will be forced to go to other vendors 
It’s a fact that other vendors (Ubiquity for eg) is ahead of Mikrotik, especially in wireless segment. (While Mikrotik is stuck at WiFi6, other vendors have several WiFi7 APs in their lineup)
For 300 bucks or so UCG Fiber is a great device, they have poe on their LAN ports, fiber, 10G eth, ssd for cameras. IDS/IPS routing at 5Gbps i think.
With the biggest packet size and it doesn’t feature TLS Inspection 
The price is competitive, but the features as a router are lackluster. ^^
Just SFP for LAN.
Tbh the device will be more interesting once the unofficial block diagrams drop.
But I got a bit of a feeling that it’s just a repackaged UDM with the same issues again and again
But a new and improved RB5009 would be great
Well, one problem with Ubiquiti i think is, they release product no matter what even if software side is not ready for release.
Their U7 Pro AP had a problem with 2.4 GHz radio i think. Don’t know of they fixed that.
I’m fine with the current port selection on RB5009, but I wouldn’t mind all 2.5Gbps and an extra 10Gbps or SFP+.
What I would really love from mikrotik is HW offloaded PPPoE.
Where I live, PPPoE is sadly still popular. Currently I only have 1Gbps, and have been waiting on my ISP for over a year now to expand their 10Gbps offering to my street, and while it doesn’t looks like that’s coming very soon, I’m probably gonna switch to the UCG fiber when that happens as that has hw offloaded PPPoE.
Also Banana Pi BPI-R4 Pro Router board jump n the competition for a more “appropriate” number and types of port speeds.
Any news from Tik? Really looking forward for a successor of my RB5009, I don’t want to move away from routeros, but the port gap with competition is now relevant.
You could add a CRS310-8G+2S+IN to your setup, link it to the RB5009 at 10Gbps, and have 8 more 2.5Gbps and an extra SFP+ port.