According to The Jordan Times, the “centrist” National Constitutional Party (NCP) says it would be premature to adopt a party-list system–evidently meaning a fully list-based system, for the news item leads with:
Centrists on Saturday called for a new elections law that combines voting in “geographically identified districts” and a proportional representation list.
This appears to be an endorsement of some form of mixed-member system.
[The NCP leader] expressed concern that elections on the basis of partisan tickets might only benefit the Islamic Action Front, which demands an elected parliamentarian government. What the centrist parties want, he explained, is a system based on one vote for the district and another for a “bloc”.
Jordan’s current electoral system is single non-transferable vote (SNTV), although it is known rather awkwardly as the “one man, one vote” system. (That term, although a literal description of SNTV, among many other systems, elsewhere refers to an absence of malapportionment, which is something Jordan actually has a good deal of.)