Hi
1. Unfortunately, the download category page doesn’t support 5 or 6 columns. Currently, it only supports 2 and 3 columns. If set it to 5 or 6 columns, you can add the following custom CSS to Appearance > Customize > Additional CSS, but the buttons will be hidden, because space is not enough to display. See this screenshot https://www.dropbox.com/s/xniupxb4sh0brdf/Screenshot%202018-08-19%2001.59.30.png?dl=0, you will know what I say.
.tmvs-grid .post{width:17%;}
.tmvs-grid .post .tmvs-grid-title{font-size:14px;}
.tmvs-grid-item{min-height:110px;}
.text-desc .details, .text-desc .button{display:none;}
2. Yes, it’s cool, thanks for this suggestion, we will try and add this feature to the new version soon.
3. Yes, you can, but EDD Product Grid doesn’t infinite scrolling now, you can only enable pagination.
Actually, recently we think to use Elementor page builder to instead of WP Bakery page builder, because we have already developed many more powerful widgets for this page builder such as this feature you request: infinite scrolling, but we haven’t added this feature to WP Bakery page builder yet. We want to know whether Elementor page builder is most wanted or not for DGWork, and the old DGWork users have to rebuild the pages if they want to change the page builder, it’s a question. Happy to hear your opinion.
Thanks!