From a press release issued by the FIM, which seems to offer more evidence that the intake restrictors now seen in World Superbike are on the way out:

The future of Road Racing World Championships

Evolution of the Grand Prix and Superbike Technical Rules

Following the statement made by FIM President Francesco Zerbi during the Press Conference held in Geneva on May 21 last, the Commissions of the two Road Racing World Championships, Grand Prix and Superbike, will have separate meetings during this month in order to discuss proposals for possible changes in the Rules of the respective Championships in the near future. The main subjects to be discussed concern essentially technical and safety rules. As suggested by the President, some adjustments may be needed concerning the power, high speed and technology of the Grand Prix prototypes in relation to safety aspects, but without holding back the technical evolution. On the other hand, the Superbike machines, derived from the production series, need to be technically more simple and also less expensive, for example following the rules in force in the United States, Japan or Great Britain.

After having received the reports of both meetings, the FIM President will then meet with representatives of MSMA and of both promoters, Dorna and FGSport, in order to study these proposals and take short, medium and long-term decisions. This meeting will be held in Geneva on July 9 next.