Leaks aren't reality until it releases. The 5600X is what - a year old? I'd hope that something new coming out would beat it. Now we wait to see what AMD does.Intel's 12400 ES/QS samples are beating 5600x in leaked data, using DDR4. 10400 and 11400 were about $185 with integrated graphics. $160 - $170 without graphics. That's $100 less than a 5600x.
My 3960X beats the pants off a 7980XE - does that say that the 7980XE was poorly priced, or that generational changes made it less competitive/valid since it's older? Heck, Intel used to charge 2k for those - the 10980 dropped because of threadripper, so I'd say those arguments go both ways on pricing.
As for the 10400/11400 - I rarely pay attention to mid-range kit, but that's good pricing to make it competitive with an (arguably) better architecture. Good on Intel. Lets you decide if you want to pay for the architecture, or save and just get cores.