There are now plenty of special buildings giving the type of rewards that the Speakers Corners provides (or the attack bonus that most players like from the Speaker's Corner). Even, there are smaller and more efficient buildings giving more Attack %/space tile than the Speaker's Corner. No need to repeat.
Speaker's Corner (VF era):
- Stats: 1588 pop, 17860 coins/24, 10% Attack Size: 3x3
Checkmate Square (VF era):
- Stats: 1588 pop, 17860 coins/24, 10% Attack Size: 3x3
- Same stats as Speaker's Corner.
Sakura Rock Level 2 (VF era):
- Stats: 3530 happiness, 10% Attack, Size 2x3
- 33% smaller size with same Attack %, (however requires contact with other Cherry Blossom Set pieces for full benefit).
Royal Marble Gateway (VF era):
- Stats: 1294 pop, 1294 happiness, 8400 coins/8hr (25200 coins/24), 7% Attack Size 3x2
- less population but provides its own happiness, more coins per day if collecting 3 times per day.
- 3% less Attack (7% vs 10%), but requires 33% less space, therefore slightly better Attack % per space tile used.
Botanical Rotunda (VF era):
- Stats: 3180 happiness, 10% Attack, Size 3x3
- Same size and Attack %, However, Speakers Corner's other rewards are better than happiness from Rotunda.
There are other examples, and these are available at the Antiques Dealer or given away during events.