Personally, I'd prefer if most moves used their Gen 5 power and accuracy values, with the exceptions of Gen 6+ moves using their stats from the generations in which they were introduced, Tackle using its Gen 1-4 stats, Selfdestruct and Explosion using their Gen 2-4 stats, and Leech Life being base 50 power (an average of its old and new power values).
Good to know, I didn't expect someone who prefer Tackle with 95% accuracy. I personally don't like Hydro Pump-like moves having 110 power. I prefer Leech Life weaker, but if I do this, I should adapt many learnsets (to avoid learn it only at late levels) and this is impractical for me.