I watched an England side that had (generally) much better players than in the recent decade or so getting increasingly hammered by all and sundry. Consequently, central contracts had to come in because we were expecting our best players to fly around the world playing endless series and also play county cricket in between.
We had the likes of Botham and Gower wasting their energies on meaningless county matches whilst their international opponents had the opportunity of honing their skills and bank balances whilst not being expected to turn out for another side in between Tests. If Michael Holding had to jump in his car after a Windies match to head back to Derby maybe this would've evened things out.
If you want to go back to the 1990s, then don't expect any improvement from the national team, it'll only get worse. England players will simply head off to the IPL/BBL etc where the money is more and the workload is less.
Problem is, the selectors have become so enamoured of certain players, and so dismissive of the county game, that they have squandered the benefits of Central Contracting.