It is frustrating, there are undoubtedly people 'out there' with information pertaining to pre-1500 people but that info is denied us due to the pre-1500 certification precluding ANY info being posted unless by a pre-1500'er.
I, for example, have data tracking the Bramfield Rabett line back, via a 1066 frenchman known as Rabel Artifex (who was a unique Invasion character, and believed to be the engineer of the first Norwich castle). He is indicated to be on a Tancerville line not as yet on wikitree, but which I have data upon.
It is a pity that there is not some mechanism by which a non pre-1500'er can post data - flagged as requiring pre-1500'er verification for example.
That way assistance could flow both ways, to create a far more informative pre-1500 database.