how many visa options do you need for a holiday? There are visa free entries and several tourist visas plus a few longer term visas. Pretty good and better than many other countries.
Think of the o-visa being like a ticket to enter. You have 90 days to use it to enter Thailand. It's been used once you enter. Then you are stamped in for your actual permitted stay.
It's the same for those already on list for 60 days without visa. The "change" is not really a change but a tightening up of current entry rules. Too many people have used back to back entries with extensions so they can live in Thailand without visas. Unfortunately it has 'caught up' those who can do a 6 month vacation to escape their winters using no visa "visa exempt".