I have no issues with the cards. I think that they are a compromise of multiple issues including the maount of info needed to be included, legibility, and product packaging. Personally, I just laminate my cards (and only one for each model type). This makes them flat, durable, and cheaper than laminating every card. It also means I don;t need to find sleeves for them. When it comes to marking wounds, I just use wound counters. this also solves the problem of trying to remember which card is for which model when there are multiples of a single sculpt.
I agree with the legibility comment, it can be rather difficult to read the numbers. Suits just need some familiarity with the new art to be read across the table. As to the Weak/Moderate/Severe, it is actually marked. Each card has a dot next to the number which indicates the W/M/S status. Though, after a few games, most players will remember the ranges (1-5, 6-10, 11+).
The problem is that, like all hardcopy rules, there is the potential of them becoming obsolete over time. At least Wyrd is trying to keep the rules updated through Errata and FAQs. Even better, the produced the rules manual which consolidated the rules with many of the early errata and FAQs. This is better rules support than I have seen from many other game companies, and I for one greatly appreciate it. Based on the past support, I would expect to see future updated Rules Manuals as well.