Supposing the source is good it's good news that riders also want this. Except the top speed limit ... who the .... is the sissy that asked for a top speed limit???? It's OK if it's Nakano (he's allowed to whine about that since his rear tyre exploded at 300km/h+ in a straight) if it was someone else he is really a sissy!
For me, right now, the priority is single tyre and banned TC (= control ECU). Fortunately I think single tyre will be achieved soon (2009?) thanks to latest .... up of Michelin, unfortunately getting rid of TC will be much harder, all the teams spend a lot on it and want to reap the benefits of their research. But I think they understand that this road is a dead end and that sooner or later it will have to be banned like it happened in F1.
About the rest:
990cc that's OK for me, not too sure MSMA will be happy about it after spending a lot of money in 800cc development. Anyway for me it's not too significant current 800cc have the power (and torque) of first 990s, and you don't see them handle the same, problem is electronics. Plus don't think they can get that much power back with the fuel restriction on the 990cc.
Thinner tyres is OK but you can't make them TOO thin can't have MotoGP bikes looking like 125s. But the change to single tyre will alone make them considerably slower. They could go for longer distance tyres (1set for quali and race?) so they are forced to use harder compounds and it would reduce costs quite a lot.
Top speed limit .... NO ....... WAY