Problems and suggestions for Rekordbox 5.01

Alright, so I've been using Rekordbox Performance mode for about a year now with a DDJ-RR. Just now i got a regular gig where they have 2x CDJ 2000 and a DJM 800. I came from serato but because of the eco system pioneer has I switched over to Rekordbox and I'm glad I did it. The new Rekorbox 5 is great but sadly I am having some issues with Rekordbox.

Setup:
2x CDJ 2000
1x DJM 800
DDJ-RR

Lenovo Y50-70-01132
Windows 10
Intel Core i7-4710HQ
GeForce GTX 860M
8GB DDR3L RAM

Problems:
- Sound glitches sometimes (since older versions) also when playing in export mode through laptop speakers. Already tried different buffer settings but this does not help. Also happens when playing with DDJ-RR
- When in HID mode and Im scrolling through songs in another playlist, the playlist sometimes jumps to the playlist of the playing song (since 5.01)
- Scrolling through playlist and songs sometimes freezes. If i use the mouse I have no problems but scrolling with the knob on the CDJ and DDJ I get this.
- When playing a sample rekordbox freezes sometimes (since 5.01) and sound goes out for a second or two.
- Selecting a playlist from the playlist pallete takes a long time to load (since 5.01)

Something I noticed is when playing with 2 CDJ 2000 I need to switch the decks output channel in the settings. So for example, I got the left CDJ 2000 as deck 1 selected in control mode and the right CDJ 2000 as deck 2. Deck 1 is on channel 3 and deck 2 is on channel 4 on the mixer (DJM 800). For some reason the sound from deck 1 goes to channel 4 and the sound from deck 2 goes to channel 3. If I switch the input channels on the mixer its still the same. Also if i switch USB cables its still the same. If i go to the audio settings and switch the output channels so deck 1 gets played through cdj(2) and deck 2 to cdj(1), its fixed.
BUT, when I switch the right deck (cdj 2000) for a cdj 2000 nexus, I need to switch back the audio settings.
Its not much of a problem for me, but it took some time to figure out.

Suggestions:
- Please make the key sync bigger. I would suggest to go back to how it was shown in 4.xx
- I love the easy beatgrid adjustments options in perfomance mode but i find the pad mode display a bit to much wasted space when connected to CDJ
- Its kinda hard to see if slip, quantize and master tempo are on or off. Maybe put them bigger under the loop options next to it.
- I would like the option to play samples without the sampler popping up. I mostly use the left 8 sample slots and got them assigned to my keyboard so I know what they are.

I hope I have provided enough information to work with.