I'm honestly surprised the general uptake on Arc Warden is this slow for most of Dota's populace. More often than not, I see underfarmed and useless Arc Wardens than anything. Ones that just feed Necros and barely use their Spark Wraiths. I think the critical thing people miss on him are using Spark Wraiths from both the real one and the double. You get a ton of coverage if you plant those things well, or placing multiple on top of each other for more damage. I'm sure they probably also forget to use the Midas on the double.
Also, yeah, Pudge is really good. Only potential issue I can see with him is which lane to put him in. I'm guessing the lane is offlane, but I feel like he's just not a good laner in general. Aghs Aether Lens is really good, and even before you get Aghs, having the lifesteal on Dismember is so useful.