I don't see any of this aitcoins in anyway better of than bitcoin in terms of anything. Remember when bitcoin was launched in 2009 and after while it becomes the hot coin against other digital assets like gold and crude oil. So the aitcoins you mentioned above came after bitcoin there is a need to make transactions fast and convenient for buyers but still not to be compare with bitcoin transaction.
It is somewhat a promotion thing when every Alticoins is created they always point at some certain self aclaimed flaws of the bitcoin and they project to correct the problem. Things like transition from POW to POS, lower transaction fees, faster transaction speed and a very high Return on Investment. We have all seen how all of them have faired since then. these are ways to lure people into those alt coins just like how Ponzi scheme. Bitcoin decentralization and hedge against inflation can’t be match and with the regular BIPs it will be hard to have any alt taking bitcoin place