Out of interest, what is it you don't like about a 2 tiered console launch? It's really difficult to think of any other product category where you do not have a lot of options for everything you buy. From foods, to clothes, to furniture, to electronics, to transport to your home. Isn't is just a case of weighing up the options and buying what is best for you?
The console market is very much different from food, clothing, and furniture. Those things are items you buy, and they exist and function in their role for as long as they last. Console launches are more akin to other media formats where you might have a VHS and a Betamax competing for market share. Where the market for physical movies and movies has been limited to one dominant format, console games have had 2-3 competing platforms for recent history. It's really been 2 except for Xbox/PS2/GC, because after that Sony and Microsoft continued being direct competitors while Nintendo has done their own thing. But much like VHS vs Betamax, if one format takes out another other, and you picked the losing format, you end up having a platform that isn't supported by new content. That's not a situation you would be in if you bought a coffee table, shirt or sandwich.
With that history in mind, there are a few things I dislike about the abstract idea of a 2 tiered console launch. Keep in mind I'm not talking about things like PS3 and 360's launch where there were multiple versions of the systems that may not have identical features, but the core functionality (playing PS3 or 360 games) is identical. I'm talking about the hypothetical launch of 2 consoles, both marketed as "next gen", where one is slightly more powerful compared to the previous generation and the other is a true generational leap. Because in graphical power here, that's what we are talking about here when we compare One X to Lockhart and Anaconda.
I don't like the market confusion that a 2 tier console might cause. I thing you have a bit of a puzzle to solve by marketing 2 products with different performance profiles to a public that mostly still doesn't understand what 4k even means. I also think that the 2 tier pricing might be confusing to people.
I also don't like the possibility that the weaker console holds back the stronger one. If the rumors of Lockhart having a substantially weaker CPU are true, this would be the case, unless it's simply a repackaged One X and is treated as such. If games perform worse on Anaconda than they do on PS5 simply because the hardware cannot be leveraged properly to maintain Lockhart compatibility, that could be a problem.
Mostly I don't like the idea of Microsoft being beaten in the market so badly that they might withdraw from the console space. I think competition between platforms in the console space has lead to some great innovations, especially in controller design and what amounts to the social networking features one XBL and PSN. Achievements, trophies, friends lists... Steam copied most of these ideas and it's even trickled back to PC games. The entire industry is better for it. So at the end of the day I don't like the idea of Microsoft (or Sony) having a confusing launch with games that don't perform well against their competition that leaves the market with a single format monopoly. Well, I mean, I guess we would still have Stadia.
You mention options in your question. I'd agree that I like having options to weigh. But I'm scared giving people too many options day 1 might result in one company leaving the market and then we have less options after that.