I don't think it will suck. The biggest concern I have is with the word walls and the chance that I might run into a Dragon Shout word that is a latter part of a sequence I don't have, effectively making it worthless; for example, running across "Dah" from the "Fus Ro Dah" shout without knowing "Fus" or "Ro". Granted, this will probably be averted by having the word walls give you the next word in the sequence instead of specific words, but still, it is a bit of a concern.