-1
The current meta is hard-set on grinding jobs, and jobs are actually pretty decently balanced at the moment. However, some jobs require god tools and some don't. Removing mending will hurt jobs such as digger, woodcutter, and miner while making already overpowered jobs such as artist and farmer more overpowered in comparison. Don't ruin the balance because you want the game to be slower.
And, notice that I said the game will be "slower," not "harder." There is no challenge in mining in a straight line for diamonds and then left clicking mobs at a grinder for 20 minutes to get the enchantments. Everyone has protection 4 armor at this point, it is impossible to die while mining. Grinders are commonplace, it is impossible to die while gaining XP. There is no risk, it is not hard, it is just time consuming.
Let people focus on their jobs instead of screwing with the balance for no good reason.