Update index.md

Author: murrellb

docs/src/index.md

@@ -21,16 +21,16 @@ hero:
       link: https://github.com/MurrellGroup/MolecularEvolution.jl
 features:
   - title: Flexible Model Development
-    details: Create custom evolutionary models by defining how your new (or already existing) probability distributions evolve along a branch, and get likelihood calculations (and much more) for free! • Mix and match different models on the same phylogeny.
+    details: Create custom evolutionary models by defining how a process evolves along a branch and get likelihood calculations (and much more) for free! • Mix and match different models on the same phylogeny.
     link: /framework
-  - title: Rich Model Library
-    details: Codon, AA, nucleotide and generic discrete character models as well as continuous Brownian motion in 1D. Site- and branch-wise mixture models and more.
+  - title: Model Library
+    details: Nucleotide, AA, Codon, and generic discrete character models • Continuous models (eg. Brownian motion) • Site- and branch-wise mixture models and more.
     link: /models
-  - title: Powerful Tree Operations
-    details: Optimize model parameters, branch lengths and root state/location. Perform tree rearrangements (NNI). The above can also be made in the Bayesian framework by sampling over posterior tree and parameter spaces with MCMC. • Infer ancestral states.
+  - title: Tree Operations
+    details: Optimize model parameters, branch lengths, tree topology (NNI), and root position for maximum likelihood inference • Sample from the model and tree posterior with MCMC for Bayesian inference • Infer ancestral states.
     link: /optimization
   - title: Simulation Tools
-    details: Generate phylogenies using e.g. coalescent and logistic growth processes, and simulate both sequence evolution and continuous trait evolution on those trees.
+    details: Sample from a range of realistic phylogenies using a flexible coalescent process • Simulate discrete and continuous data under any model over a simulated or imported phylogeny.
     link: /simulation
 ---
-```
+```