I'm a shareholder. The things I saw which led me to invest:
Significant ability to raise rents in next 3-10 years. Part of the knock on the stock is that pessimists argue you have to wait to raise rents (I've seen bullish projections that account for 100% recapture in 3 years which is dumb). But since the industry is based on P/FFO or NAV metrics there tends to be significant discounting of future growth in the current price.
Supply / Demand: malls aren't what they used to be as far as demand, but sales / sf have increased since recession (it's not all doom and gloom like you would be led to believe). Better than that however no one is building more malls really, but there is tenant demand and Sears spaces are huge and can be partitioned. Which leads me to my last point.
Large outlot / parking / standalone development opportunity and pipeline. Sears automotive units can be partitioned into in line outlets as shown in presentation above. Large standalone sites can be sold as dev opportunities (Santa Monica, St. Paul, Chicago) or developed in house. Since SRG already owns all the sites they can value add through entitlement process or complete development in house.
Lastly, major mall REIT JVs will, imo, be bought back by the partner at substantial premium as major mall reits have little area for inorganic growth.