Don’t do that.
First of all, it is pointless to set each post to 100% because Google will ignore it. Secondly, it is pointless… And you’ll loose a valuable tool: Priority.
Priority does NOT tell search engines that the post is important (they decide that based on their secret algorithm) but it tells search engines what YOU think they should index first (know that search engines normally do not index your entire site in one go, unless it’s a one-page site of course) before going away to come back at a later date.
So if you set all at 100% you are basically saying the same thing as setting all to 0% … you can just as well not use priority at all.
After the search engines have indexed your entire site, Priority values are less meaningful. Unless you are giving high priority to pages that change frequently (so you are basically asking search engines to re-index them first whenever they came back) and that is exactly what the plugin does: higher priority for pages that where changed recently and pages that have frequent comments…
