Leaving feedback as-mentioned. Going to keep it short and to immediate areas which will help improve some things without having to deal with major reworks
- Your crash cymbal sample(s) and accompanying risers could do with having a pretty sharp cutoff present at around 17khz (done before reverb) to take off some of the harshness. Either a cutoff filter inside your usual Parametric EQ or a dedicated DeEsser will get the job done well enough.
- A quick improvement for the vocals situation is to look at introducing some 'low body' to it in a Parametric EQ. Experiment with boosting the vocals around the 300-500hz range to thicken up the presentation and somewhat improve clarity in a few seconds of effort (if you're not looking to redo the vocals due to time constraints).
- Tightening up the kick a small amount with some parallel compression would be an improvement which can help go a long way and is always something decent to learn about anyway. I'd recommend starting with an Attack Value of around 13 to 25ms, Release Value of around 300 to 400ms, ratio of around 3:0 to 4:0 and then spend time just adjusting threshold until you've got a result that you like the sound of (roughly). Then you can blend between the original signal and the compressed signal with wet/dry controls until you get an even more 'fine-tuned' result that you're happy with. TDR Kotelnikov or Audio Damage RoughRider 3 are both free options which can help do that duty pretty well. Then I guess afterwards there's no harm with trying an extra 1db boost to the kick for everything below 80hz