:lol
1. Wood Clones are no different from Shadow Clones apart from the fact that they are wood, and that the user can pick how much chakra he allocates to each individual clone. So wrong. Not even sure where you got the first sentence from, but it's fanfic.
2. Tobirama made Shadow Clones, and could only make 2 due to most of his chakra being used to sustain the barriers. His clones were not at full power either.
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"Even if we cancel the remaining clones...."
Meaning that cancelling the clones would up their power, but wouldn't make a difference.
When clones are made their chakra obviously does not refill to match the original's full chakra pool.
No. Clones weakening your jutsu, specifically in this scenario, is pure fanfiction.