Yes there are some inconsistencies with the tadpole story.
The most obvious thing would be to recruit Lae'zel and go to the Githyanki Creche as soon as possible, a) because the Githyanki are known to resist Illithids and b) also Githyanki happen to be available in the immediate area. Otherwise, what are the chances of getting infected by Illithids, getting stranded in some random place, and then also meeting the Mind Flayer's arch-enemies who have a proven cure. A few too many coincidences to ignore. Unfortunately, the Githyank are LVL 5 (we got forced to alternate paths) and you can only survive the encounter peacefully with a lot of charisma and move on. However, we don't know what the Githyanki will really do to us when we reach the Githyanki Creche.
Why Raphael doesn't murder us in our sleep and take at least one tadpole is also unclear. As a reminder, Edowin's tadpole was on the run from us. We could let them flee or trample them. An option to catch it and offer it to Raphael would have been interesting, but it didn't exist.
