Except those Synchros ARE useless. Nobody ever used them in real life because they took too much to summon for a monster that lasts on the field for only one turn.
It's even worse in DL due to more limited field space.
Even against NPCs, you can more easily and quickly win using less complicated cards, as well as less amount of cards. As that anon already said, the "Majestic" Synchros are useless.
Even Yusei eventually phased out his Majestic Star Dragon in favor of his Shooting Star Dragon, which is easier to summon AND doesn't go back to the Extra Deck at the end of the turn.
Anoymous
Hayden2000