You can do everything you used to do in vBulletin plus more. Scroll down the posts and notice how the URL changes with every post. Every post has a unique URL and you can use that URL to link that in your first post. You can also Edit the first post easily by going into the 3 dotted menu.
I would advice you to use the new platform for a few days to get used to it. Explore the features, ask as many questions as you can and then decide if it is better or worse then the previous one.
You can use the navigation on your right to scroll up and down quickly on the posts. There is also a small indicator on the bottom right which tells you on which you are right now and lets you enter the post number. I would suggest give it sometime to get used to.
Change is never easy. There are clear post markers and post navigation features. I will let members use the forum for about a week or two before deciding on a customization of that sort.