As if it will be a PoS. You won't know until it's released and frankly until you experienced it. Sure you can get get a second hand opinion firm a streamer/reviewer but it's not really the same as experiencing your self.
Whether 1 person made it and it cost them $100 dollars of their resources or hundreds made it at a cost of hundreds of millions, a game can be priced where ever a company thunksnit will sell. $40 is 33% discount from normally priced games. The average person completing all 5 acts on normal alone will get $8/hr of value(about 1hr per act). Less than $3/hr if they do all 3 difficulties. But who are we kidding, I'll bet most who buy this will get hundreds of hours or playtime.
As for WC3, the game was solid but missing features that were either added or are being added. Sure the removal/merger of the old game was shit, but the game itself looks good and plays fine. The SP alone was worth the price IMO. If I cared about RTS these days I may have bought it.