The initial matter of this thread was not p2w or not, but the time Raid cunsumes. The example the threadstarter has chosen, lvl 25 dungeon runs, was bad, because the extreme time sink in his example comes from insufficient teams and game decisions. If you need 6 mins to run Dragon 25, run Dragon 20 instead.
But nontheless it's a valid point that the developers keep adding new content over and over (Iron twins, Sand Devil as most recent ones), at the same time increase the benchmarks for tournaments and never do anything to reduce the time needed to play.
I vote for permanent Super Raids in every stage of the game, including arena (double reward for double risk, if you lose the fight, you lose 2x points) and infinite multi battles. 3rd party programms allready give you the latter, but it's absolutely stupid that we have to install these programms to play the game. If it's necvessary to install a 3rd party prog for a proper game experience, something is wrong with the game.
Video from Nub Raid on youtube, how long does it take to do the daily stuff. He came to 6h for the typical player. The time needed for playing Raid is ridiculous.
/edit: 9h work (including going to your work place), 6 hours Raid, 2 hours personal hygiene/cooking/eating, 7 hours sleep = 24 hours. Time for any other social interaction, talking with your family, reading a book, all together = 0 hours.