If you put heavier springs in an MX brown switch, any bump becomes quite hard to notice. If your goal is something more tactile than an MX brown switch, I’d recommend trying MX clear switches, and if those still don’t feel like you want, just picking up some completely different kind of switch.
Cherry MX are all basically linear switches, with some slight variations based on scratchy plastic-on-plastic friction. SMK “monterey”, Alps (or Matias), IBM Model M/F, Hi-Tek “space invader”, etc. switches are much more substantially tactile than MX switches.
[If you’re stuck needing an reuse an MX-compatible plate and keycaps, you might try to find SMK switches with an MX keycap mount. These should clip into any plate designed for MX switches, and with any MX-compatible keycaps, but have a different pin layout, and so need either a custom PCB or direct wiring. But I think they feel nicer than any MX switches. Then again, maybe you aren’t a fan of the loud clickiness.
http://deskthority.net/wiki/SMK_Cherry_MX_mount]