YOur point shows that he will need to escape a fight in order to survive a match, which in my mind is a weak move. He's not untouchable, he may be hard to catch for someone who does not know his fighting style, but as Bee had shown its not hard to catch on to his moves, he could be quite predictable.
To say the 1st has no chance is just plan stupid. First we no nt about his speed, nor the speed of his technquies, along w/ his darkness tech. which could fool anyone with his shadow clones (which may be similar to Zetsu as he uses the 1st DNA ), wood style locnes. As far as Minato's summons, we dont know the extent of that since we have yet to see him use them at all!!
Also, how can u conclude he is only suited for slower ppl??? Madara's speed has not been seen, and I'm more than sure he's far from slow, and he still had to catch the Fox in the mix of everything. He had to fend of one of the highest level ninja ever and the 9-tails, regardless this is a task ment for a man with speed and skill!!!
Overall all I see is people coming to the conclusion that Minato's speed is a factor, which is wrong. Hashirama most likey would know all about space-time jutsu, since his brother used it, and his wood element shouldnt be taken lightly. Minato needs to be able to get close to his opponets and plant his kunia. While Hashirmama could easily become a mid-range or long-range fighter, as shown by Yamato who is only a shadow of the 1st.