one-way portals, which many people are so afraid of, if they are not on the penalty adjacent zone, then they very rarely cause problems when used normally.
Great quote :D So one-way portals do cause problems:
1. On the penalty adjacent zone.
2. On a non-penalty adjacent zone (rarely).
3. When used abnormally.
Below are pictures of how I got kicked out of an only-HL game. When evaluating the problems, please also consider that from that one-way portal, orange's heroes kept coming through with decent power, cutting off my scouting and chains, and preventing me from finding the entrance to use that one-way portal properly.
For example, I'm not sure that my win percentage with the blue color on 6lm is lower than with the red color. FTS, whom many now recognize as top1, has said several times that his win statistics with blue on 6lm are higher than with red. This is of course all taking into account the rebate for the color in the bidding.
Well, perhaps it's precisely a matter of the rebate. I.e., if we assume that the rebate compensates for bad roads, then those games where blue gets both roads and a rebate, as well as those games where red pays a rebate and gets bad roads, will shift the balance in blue's favor.