Robinson Armament XCR-L
PWS
Faxon ARAK
CZ Bren 2 (with the correct sized gas port).
The main problems with the Vz58 are the squishy trigger, inability to change barrels, extremely low iron sights, no adjustable gas system and limited optics choices (no full sized scopes, except maybe “scout” scopes on the forend). Optics rails and railed handguards can be added for $$$.
All of those listed except CZ Bren 2 require use of the 7.62x39 AR mags, which are not continuous curve and have long been known to have serious reliability issues. Robinson even mentions in FAQs and discusses how b/c C Products is only manufacturer to work reliably, they use them exclusively. Effectively, the 7.62x39 AR mags are the same unreliable condition as AR15 mags pre-GWOT. Certain configurations/manufacturers are reliable, but given mass market lowest bidder gov't contract ARE NOT going to be reliable...
Bren 2 7.62x39 mags have also had their share of durability and reliability issues as reported on the Bren forums here.
Additionally, PWS has what looks to be the same overbored/under-reinforced bolt as most 7.62x39 standard ARs. Robinson and Faxon look to be slightly more robust, but w/ 7.62x39 having ~80% of chamber pressure of 5.56, don't know if they're fully equivalent given largely aligning to AR15-sized upper receiver/barrel extensions dimensions...
I generally agree w/ your gripes about the Vz58, but in carbine configuration, I think variable magnified optics matter less in such a role.
The higher/standard height upper rails and railed top covers were made to cowitness with forward red dot w/ magnifier or night vision on rear. And there have been monorails made that allow for rear mount variable optics in both military prototype and consumer versions. Brass/case deflectors for optics are available as well.
But like with the US military keeping the AR15 for now over 50 years. The M16A2 (Marines 1983, Army 1986) was effectively contemporary with the Vz58 at the fall of the Berlin Wall (1989/1990) and dissolution of the Warsaw Pact. So consider the Vz58 as we know it to be the M16A2. While M4A1 (1994) followed a couple years after that, widespread conversion of base M4s to M4A1s for general military troops didn't begin until 20 years later, 2014. I'll grant you the early SOPMOD/MWS (starting late 80s) is probably similar to Vz58 "upgrades" coming out of Canada and the Czech Republic during the GWOT, but the Vz58 is still at least a couple decades of MAJOR development and investment in modernizing the M4/M16.
Just imagine how much more refined the Vz58 could be if instead of throwing the baby out with the bath water, greater meaningful resources were directed to improving and modernizing the weapon system into Vz58 mk 2 or 3 or similar evolutions!
Point being, while the newer weapon systems you mention do have features the Vz58 lacks, I don't believe that the sum of any of their parts is inherently superior to the Vz58. They lack the track record of reliability; they lack the long-term parts support/gov't surplus parts inventory of the Vz58; and they too all have inherent compromises in their design.