I am with the let the OGL die camp.
I went recently over my RPG library and while there was rubbish from all periods the concentration of rubbish was highest during the early d20-OGL times.
What OGL did was encourage hyper-production while at the same time stifling creativity.
While in the 80ies-90ies we had (in fantasy gaming) DnD, Runequest, Rolemaster/MERP, Harn and WFRP, all distinctly different and fairly unique systems each reasonably well supported well suited for a given style of play. In the 00s we had DnD and well... more DnD. Until that is, WFRP2 reminded people that one can play fantasy RPG differently.
At the same time in DnD land we had such gems as "Book of Erotic Fantasy" (not that I have anything against serious take on sex in fantasy adventures, I even bought the damned thing expecting something like that, - but I do have something against books that would have been less juvenile written by a committee of horny 14 year olds), series of unbalancing class-splatbooks from the publisher that should have known better, tons of garage-printed home brew adventures that would not get pass first line of defence in Dungeon, masquerading as the edited product and tons of other garbage muddying the waters and cheapening DnD brand.
Sure, there were occasional gems in the d20 midden heap: Iron Heros and Ptolus certainly, Midnight and its attendant material, some Pazio stuff, and I have been told Necro adventures were good for the folks who are into their style.
Point is though, without OGL folks who had resources and drive to produce the product of the quality of, say, Midnight would have done so anyway under a different system. Product would still be as good, possibly better for not having to conform to the basic system made for a different game. Chaff that needs other people's brand to thrive would be separated from the wheat and RPGs would have been richer for it.
I am all in favor of WotC giving occasional supervised license to the third parties (such as Necro) who want to make specific variants of their stuff that are so tightly wound to DnD as to be unable to exist outside its cocoon but for the most part I think that for the balance/quality of DnD as well as for the sake of overall health of RPG business, sooner OGL is put out of its misery - the better.