I do own some of these packs (the ones with weapons held at 45 degree angle). Since the weapons are separate, it is easy to replace them with others than the ones provided. Personally, I found the Perry polearms to bend a bit too easily (due to metal used), and replaced them with stiffer halberds from TAG and Steel Fist Miniatures. However, others may be happy with them.
As for using them for WotR, I think in general they would be fine. Since the armoured ones are not wearing livery coats, you might want to consider placing them in the rear ranks of your retinues – though the poses with levelled weapons might better fit to the front ranks.
That said, a few of the figures have details that might have been much more common in continent than in England during late 15th century:
1.) Cloth rolls around helmets can be seen on three figures (all with the polearms levelled). At the time, such fashion was quite popular e.g. in Italy and Switzerland, but by my understanding less so in England (though apparently in early 15th century something a bit similar was popular amongst English men-at-arms). It might be possible to simply carve these off with a knife if you find them an issue, or you could even do a headswap for some variety.
2.) Cloth neckpieces, of a style usually more associated with Germany and Switzerland, can seen on another three figures (no idea what is the proper name for this piece of clothing). These would be trickier to do away by converting.
In either case, you could simply paint the appropriate piece of cloth with some neutral colour and stick to some rear rank position where they will draw less attention. Or alternatively paint them in bright colours and proudly state that they picked these fashions from some Johnny Foreigner mercenaries or craftsmen that were visiting their shire.
gets medieval.
