No not really because the alternatives are a chance of rolling any number between one and max with single weapon dice. The skewing towards the middle of two dice combined with the upward skewing of the average by reroll 1s & 2s dramatically increases the reliability into something that can be depended on in timescales of a single combat because the odds of ruling two 1-2s is pretty low & the odds of rolling 4 is even lower. The other weapons have the same max at best & shift from reliable solid damage to totally random values on any given roll. Being more likely to roll max with single die weapons only matters if a player can reliably accomplish it or they can accomplish it regularly enough to outweigh the feel of all those low rolls (our brains aren't evolved to passively crunch numbers on those that scale though so they probably won't).You are misinterpreting the probability issues. The 8.33 average for the 2d6 is still very much relevant. Yes, there is a higher probability of rolling an 8 or better, but that's because 2/3 of all rolls will be a 7, 8, 9, or 10. An 11 has the same odds as a d12, and you only have half the chance of rolling a 12. You get more certainty in the result by getting fewer extremes.
The d12 having an 8.33% chance to roll any value between one and 12 or 9.72% chance for any value between 3 &12is not a strength compared to 2d6 with & maybe even without rerolls anydice of that here & here.
d12 reroll 1s & 2s rolling better than:
- 4 or better? 87.5% odds, 2d6 reroll 1&2 was %99.07
- 5 or better? down to 77.78% odds, 2d6 reroll 1&2 was 96.30%
- 6 or better? 68.06% odds, 2d6 reroll 1&2 was 91.36%
- 7 or better? 58.33% odds, 2d6 reroll 1&2 was 81.48%
- 8 or better? 48.61% odds, 2d6 reroll 1&2 was 66.37%
- 9 or better? 38.39% odds, 2d6 reroll 1&2 was 49.39%