I definitely respect your opinion (to each his own), but I actually had the opposite feeling when I visited Disneyland for the first time (having frequented WDW my whole life).After going to DLR for the first time... Frontierland can be very tiny and still be effective. The whole land is less than 5 acres:
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WDW could make a similar move with the land behind thunder/splash
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Why does our big thunder look so much bigger on google maps?
IMO Disneyland's Frontierland is so small that it doesn't feel like there's much to it besides Big Thunder.
If you didn't know Disneyland's history, you might even think that Big Thunder was awkwardly shoehorned in. WDW's is much better, with DLP's being the best (I have never visited Tokyo).