Well it looks like after 2 weeks of waiting apple has pushed iOS 8 beta 4 to developers. Aside from the usual bug fixes and improvements it looks like we see some UI improvements as well. A few are listed below.

New in iOS 8 beta 4:

Bug Reporter is no longer in the beta.

New icons in Personal Hotspot

Reports of major stability improvements on older devices

HomeKit now has privacy settings in Privacy panel

The Emoji keyboard button has been tweaked slightly

New slide to upgrade screen

Handoff now has its own panel in Settings > General > Handoff & Suggested Apps

Text Size panel, Bold Text toggle now under Display & Brightness

Ability to turn off suggested apps in Settings > General > Handoff & Suggested Apps

QuickTypes settings are now referred to as “Predictive”

Spotlight uses Bing Search for web results

Web Results in Spotlight can be toggled off

Added options to delete video/audio messages after 2 minutes or never

UI of the Clear buttons in Notification Center has been tweaked slightly

Animation for opening the App Switcher has been slowed

Health app tweaks

Keyboard Dictation now streams voice input, similar to Siri in iOS 8

For us this update is no reason to loose a Jailbreak. So if you like your Jailbreak make sure to stay away from the iOS betas. Apple is closing the restore door faster on every iOS drop. So if iOS 8 drops you want to be in a good spot on iOS 7.1.x or lower to keep your Jailbreak.