I've never used the FEA module for thermal analysis, so I don't know all of the answers:
Steady state and transient analysis - Don't know
Conduction, convection and radiation - Conduction and convection, but I don't believe it handles radiation
Temperature and pressure dependent thermal conductitivity -Don't know, but I believe that conductivity is assumed constant
Anisotropic thermal conductivity -Don't know, but I believe that conductivity is assumed constant
Material propety aliases (for easy re-assignent materials to models) -You can pick materials from a table, so it is easy to assign/reassign
Automatic calculations of capacitances and linear conductances and radiation conductances thru MLI - Don't know
Ablation calculations -Don't know
Calculate interface conductances along surface edges -Don't know
Thermoelectric coolers -Don't know
User defined variables for parametric study -I don't believe that the FEA module can access any parameters and adjust them
Verify model with checking tools (active surfaces, duplicate nodes, overlapping surfaces, free edges etc.) -There are some checking tools, but I don't know if it meets what you are looking for. Most of what you specified should be handled automatically since you would be dealing with solid models and automeshing
Organize models using submodels -Yes
Manage models with Model Browser -I think that the that answer is yes
Run multiple analysis cases in sequence -I don't know of a way to automate the sequence, they would need to be started manually
Postprocessing tools for animation, temperature history plots, and temperature contour plots, etc. -There are postprocessing tools, but since I've never run thermal analyses, I don't know what postprocessing tools are available.
Defeaturing tool (remove unnecessary features from CAD models) to simplify model meshes -Since Creo Elements/DIrect Modeling is an explicity modeling tool, there are plenty of tools to defeature your models.
Built-in functions for modeling primitive shapes, Boonlean Operations, 2D sketching tools -Since Creo Elements/DIrect Modeling is an explicity modeling tool, there are plenty of tools to create primitive shapes.
